Steelers7510
Mar 14, 05:14 PM
Wirelessly posted (Mozilla/5.0 (iPhone; U; CPU iPhone OS 4_2_6 like Mac OS X; en-us) AppleWebKit/533.17.9 (KHTML, like Gecko) Version/5.0.2 Mobile/8E200 Safari/6533.18.5)
Well just another failed product by microsoft.
Well just another failed product by microsoft.
sotied
Oct 19, 09:44 AM
While the events at Podcamp Boston (http://www.podcampboston.org) begin that weekend, I think it's more important to gather at the Hingham Apple Store at the Derby Shoppes to get Leopard.
Who's in?
Jeff
http://www.bowlofcheese.com
http://www.stegdag.com
http://www.jeffcutler.com
http://www.thingstoworryabout.com
Who's in?
Jeff
http://www.bowlofcheese.com
http://www.stegdag.com
http://www.jeffcutler.com
http://www.thingstoworryabout.com
mfram
Mar 28, 12:25 AM
I was able to get an image displayed based on a bitmap my program computed. The code looked something like this (paraphrasing)...
Watch the trailer for quot;London
The original: Gloria Swanson
London Boulevard
Keira Knightley, Ray Winstone,
Keira Knightley as
The trailer for LONDON
londonbo London Boulevard
london boulevard colin farrell
starring Keira Knightley
Keira Knightley - London
in dem Keira Knightley die
with London Boulevard.
ddrueckhammer
Oct 11, 09:13 PM
Agree. Although not horrible, 'Pages' did not do it for me either. How about MACcel. No, that sux too. Maybe Cellmate? That would appeal to those who refused to "Just Say No". Hmm, I am glad I never studied marketing.
Pages is a great app. Text only documents even come out looking better than MS Word. I think people don't like it because it isn't an exact clone of Word. It reminds me of people who won't try a Mac because the OS looks different and scares them haha.
Seriously, if you don't like the inspector then right click on the toolbar at the top and customize it. You would be surprised just how much it can be made to look and function just like Word. If you don't want the templates to come up at start then you can turn that off too.
I think that the two big shortcomings that I find with Pages is the lack of a full mail-merge functionality, which will be fixed with the release of "Lasso" or Numbers or Charts or whatever it is and the lack of a built-in thesaurus as I really don't like to copy and paste from the system wide one. The thesaurus issue is supposed to be fixed with the next version of Pages as well.
Pages is a great app. Text only documents even come out looking better than MS Word. I think people don't like it because it isn't an exact clone of Word. It reminds me of people who won't try a Mac because the OS looks different and scares them haha.
Seriously, if you don't like the inspector then right click on the toolbar at the top and customize it. You would be surprised just how much it can be made to look and function just like Word. If you don't want the templates to come up at start then you can turn that off too.
I think that the two big shortcomings that I find with Pages is the lack of a full mail-merge functionality, which will be fixed with the release of "Lasso" or Numbers or Charts or whatever it is and the lack of a built-in thesaurus as I really don't like to copy and paste from the system wide one. The thesaurus issue is supposed to be fixed with the next version of Pages as well.
eawmp1
Oct 25, 04:09 PM
The comparison with the MacBook Pro and the old Air I get...but against the iPad? :confused:
SideStepSociety
May 7, 03:19 AM
I actually did something similar awhile back. Except I did three partitions and used MBR instead of GUID, if that's what you were using. I set the NTFS partition as the first, so Windows computers without Boot Camp could still use the drive without me having to install anything or do any extra work to make it work. Not sure if computers without Boot Camp will read NTFS partitions outside of the first with MBR, never tried.
Second and third partitions were both HFS+. The second partition was for general storage, while the third was strictly for Time Machine.
Ultimately, it's been working pretty well for me.
The only downside is, on computers WITH Boot Camp installed, I sometimes have trouble ejecting the drive. It's constantly complaining it's in use, when it usually isn't. However, on computers WITHOUT Boot Camp, it ejects just fine.
Windows, :rolleyes: amirite? :p
Second and third partitions were both HFS+. The second partition was for general storage, while the third was strictly for Time Machine.
Ultimately, it's been working pretty well for me.
The only downside is, on computers WITH Boot Camp installed, I sometimes have trouble ejecting the drive. It's constantly complaining it's in use, when it usually isn't. However, on computers WITHOUT Boot Camp, it ejects just fine.
Windows, :rolleyes: amirite? :p
jbirds1
May 1, 11:34 PM
I was told by another member that this site is very informative and helpful.
What I'm looking for is the best/coolest/most productive apps out there.
I already have the basics like weather, facebook, and stuff like that. I'm looking for other apps you use that most don't know about.
Games too, if you have any awesome games.
Thanks, and I'll sit back and listen.
No one?
I'm basically looking for a list of your favorite apps, and what they do.
What I'm looking for is the best/coolest/most productive apps out there.
I already have the basics like weather, facebook, and stuff like that. I'm looking for other apps you use that most don't know about.
Games too, if you have any awesome games.
Thanks, and I'll sit back and listen.
No one?
I'm basically looking for a list of your favorite apps, and what they do.
drummr
Apr 7, 10:53 AM
Yes!....wait....No!.....wait......what?:confused:
bombavich
Jun 20, 10:13 AM
I went to the 3G launch at cpw at teesside park. Queue was about 20/30 people at 7am. It opened at 8. If you know it it went from cpw down to brantano. Sold out of 16gbs about half way through the queue.
I think the town centres will be less popular and should be a better bet if you really want a particular model. Plus there's more shops - I think mbro still has two o2's and a cpw?
I hope it's easier this time as I don't fancy another early start. Hopefully other carriers will have it on thursday too to dilute the queues
I think the town centres will be less popular and should be a better bet if you really want a particular model. Plus there's more shops - I think mbro still has two o2's and a cpw?
I hope it's easier this time as I don't fancy another early start. Hopefully other carriers will have it on thursday too to dilute the queues
bingefeller
Nov 3, 12:45 PM
Black menu---> http://www.maxthemes.com/
Download Aqua Extreme. Choose the "Obsidian" package after you download it.
Icons---> http://www.matthewrex.com/blog/2009/07/25/tron/
Thankyou!
Download Aqua Extreme. Choose the "Obsidian" package after you download it.
Icons---> http://www.matthewrex.com/blog/2009/07/25/tron/
Thankyou!
joelovesapple
Mar 20, 10:29 PM
Please close thread, thanks
Simon Liquid
May 12, 11:24 AM
Or maybe they're serving it from an iWalk. ROTFLMA!!!!!!!!!!!!!!
Dreadnought
Aug 15, 08:20 AM
use te script of mc68k. You set it up once, and never notice or see it! Look in the FAQ for the link/to download his app.
Optimus Frag
Apr 4, 04:45 PM
It's not that the MacBook Air is evolving into a mainstream product. It's the mainstream that's evolving into MacBook Air-like products.
Hit it on the head there sir!
I was giving serious consideration to getting a pimped up 15 inch MBP as a full on replacement for my 4 year old iMac and be mac portable. But thinking about it do I really need that level of power and lug around that much weight when I can buy the cheaper pimped out 11 inch MBA to use in conjunction with my existing iMac.
I'm REALLY taken by the form factor of the 11 inch. Instant on and just sling it in my backpack and go. Want to wait to see if sandy bridge turns up soon in one.
Hit it on the head there sir!
I was giving serious consideration to getting a pimped up 15 inch MBP as a full on replacement for my 4 year old iMac and be mac portable. But thinking about it do I really need that level of power and lug around that much weight when I can buy the cheaper pimped out 11 inch MBA to use in conjunction with my existing iMac.
I'm REALLY taken by the form factor of the 11 inch. Instant on and just sling it in my backpack and go. Want to wait to see if sandy bridge turns up soon in one.
autrefois
Jan 1, 03:55 PM
Originally posted by Doctor Q
Look farther down, and it says
< Contact Us - Mac Rumors - Mac News - Daily Tunes >
with links to all three.
Thanks Doctor Q and Sea Fox. I was puzzled at first since I don't see those things, and I finally figured out why you see it and I don't--you must both be using the default style sheet [I checked and sawwhat you mentioned].
In the Mac OS X style sheet, at the bottom of the page, it has this:
< Contact Us - chaosmint >
as well as icons for emailing, printing, or subscribing to the thread (if you're in a thread), the forum rules, etc. But no link to the main site either on the top or on the bottom (clicking on the MacRumors.com logo brings you to forums.macrumors.com).
I did discover a link to the main site on the very first page of the forum (forums.macrumors.com) in the upper right-hand corner where it lists the Newest Member, etc., but it doesn't appear when you're in a thread.
Keira Christina Knightley
Subscribe. London Boulevard
They join Keira Knightley and
London Boulevard
Look farther down, and it says
< Contact Us - Mac Rumors - Mac News - Daily Tunes >
with links to all three.
Thanks Doctor Q and Sea Fox. I was puzzled at first since I don't see those things, and I finally figured out why you see it and I don't--you must both be using the default style sheet [I checked and sawwhat you mentioned].
In the Mac OS X style sheet, at the bottom of the page, it has this:
< Contact Us - chaosmint >
as well as icons for emailing, printing, or subscribing to the thread (if you're in a thread), the forum rules, etc. But no link to the main site either on the top or on the bottom (clicking on the MacRumors.com logo brings you to forums.macrumors.com).
I did discover a link to the main site on the very first page of the forum (forums.macrumors.com) in the upper right-hand corner where it lists the Newest Member, etc., but it doesn't appear when you're in a thread.
Peterkro
Feb 27, 09:46 AM
^^It's bit unclear to me who the third member would be,China and the U.S. sure,as far as I know the Russian Federation is a signatory.India of course is agin it but is only a temporary member.
( on further investigation it appears they haven't fully ratified it yet due to problems with their constitution they are however working towards full ratification.30 odd countries have signed but not ratified)
( on further investigation it appears they haven't fully ratified it yet due to problems with their constitution they are however working towards full ratification.30 odd countries have signed but not ratified)
demallien
Aug 10, 06:31 AM
http://www.macrumors.com/images/macrumorsthreadlogo.gif (http://www.macrumors.com)
Microsoft has claimed that to port VirtualPC to Intel would be much like making VirtualPC 1.0 all over again.
That sounds like a load of rubbish to me. They have VirtualPC for PC, so the actual "virtualisation" part could be taken from there. They also know how to use the various hooks in MacOSX, because that's what VPC7 for mac uses.
Which is not to say that it would be an easy task, but let's say that 50% of the work was already done. This seems like a reasonable estimate to me, and would be backed up by the time it has taken VMWare to create their Intel Mac version of their PC software....
I'm not normally one for conspiracy theory, but with Microsoft dropping WMP, IE, VirtualPC, and reducing 100% support for Office on the Mac, all in the last 12 months, I would suggest that Redmond is starting to get a little worried about Apple for the first time since the 1980s
Microsoft has claimed that to port VirtualPC to Intel would be much like making VirtualPC 1.0 all over again.
That sounds like a load of rubbish to me. They have VirtualPC for PC, so the actual "virtualisation" part could be taken from there. They also know how to use the various hooks in MacOSX, because that's what VPC7 for mac uses.
Which is not to say that it would be an easy task, but let's say that 50% of the work was already done. This seems like a reasonable estimate to me, and would be backed up by the time it has taken VMWare to create their Intel Mac version of their PC software....
I'm not normally one for conspiracy theory, but with Microsoft dropping WMP, IE, VirtualPC, and reducing 100% support for Office on the Mac, all in the last 12 months, I would suggest that Redmond is starting to get a little worried about Apple for the first time since the 1980s
No ice please
Feb 10, 06:56 PM
Transferring a 4 gb movie from a dvd and it stayed the same.
tigress666
Apr 15, 06:37 PM
b
I do I agree, I would love to see starcraft 1 touch on the ipad......but I'll play Red Dead Redemption or Dead space on my tv
Well, as I said before, this isn't iphone against consoles, this is iphone against other handhelds. We should be comparing games we'd expect to play on the handheld devices.
Of course console is going to be better. If we are talking about playing at home and not needing portability, of course the console is a better choice than any of the handhelds.
You're comparing apples to oranges here. You may not be interested in handheld gaming, but that is what is relevant to this discussion, not console gaming. The iphone and other hand helds really aren't competitors to consoles, they serve a different purpose really.
I do I agree, I would love to see starcraft 1 touch on the ipad......but I'll play Red Dead Redemption or Dead space on my tv
Well, as I said before, this isn't iphone against consoles, this is iphone against other handhelds. We should be comparing games we'd expect to play on the handheld devices.
Of course console is going to be better. If we are talking about playing at home and not needing portability, of course the console is a better choice than any of the handhelds.
You're comparing apples to oranges here. You may not be interested in handheld gaming, but that is what is relevant to this discussion, not console gaming. The iphone and other hand helds really aren't competitors to consoles, they serve a different purpose really.
adomanico18
Feb 23, 02:50 AM
Macbook Pro 15" Unibody
Intel Core 2 Duo P8600 2.4 GHZ
4 GB RAM 1066Mhz DDR3
128 Patriot Warp V2 SSD
9600M GT 256MB
Changed the Battery 2 months ago. It has 100-99% life.
Works Perfectly no defects
thoughts?
Intel Core 2 Duo P8600 2.4 GHZ
4 GB RAM 1066Mhz DDR3
128 Patriot Warp V2 SSD
9600M GT 256MB
Changed the Battery 2 months ago. It has 100-99% life.
Works Perfectly no defects
thoughts?
gauchogolfer
Oct 12, 04:56 PM
And if you need to use those pages or keynote projects at work or in school?
I used Keynote in school and currently use it at work, giving scientific presentations on a monthly basis at the least. There is not a huge need for it to be interoperable with PPT for me, although I can import what I need from colleagues and make it look much nicer in my Keynote talk. From what I've seen, Office needs to become interoperable within itself before people whine too much about compatibility between iWork and Office.
I used Keynote in school and currently use it at work, giving scientific presentations on a monthly basis at the least. There is not a huge need for it to be interoperable with PPT for me, although I can import what I need from colleagues and make it look much nicer in my Keynote talk. From what I've seen, Office needs to become interoperable within itself before people whine too much about compatibility between iWork and Office.
eclone
Apr 6, 10:09 AM
The problem is you're not searching hard enough ;)
http://www.belkin.com/IWCatProductPage.process?Product_Id=492842
This is the best I've come across. It's low profile, sturdy, one button controls calls and switching tracks in itunes and best of all, works with thick cases (ie candyshell).
http://www.belkin.com/IWCatProductPage.process?Product_Id=492842
This is the best I've come across. It's low profile, sturdy, one button controls calls and switching tracks in itunes and best of all, works with thick cases (ie candyshell).
Doctor Q
Jan 12, 12:55 PM
I can't resist reporting this article, because it contains this sentence that you don't see very often:
"Surprisingly, Howe said, their inspiration came from cockroach legs."
Rather than build a robotic hand that could avoid mistakes while grasping a variety of objects, researchers build one that can correct mistakes on the fly, which is what humans do.
Despite its four-fingered form, the resulting hand has several human characteristics. At rest, its joints are opened from 25 to 45 degrees, and the joints at the base (our palm) are more flexible than the joints of the fingers. Dollar also added sensors to detect when a finger touches an object and the angle of the joints. While the hand automatically adjusts for many small errors, the sensors enable it to compensate for larger miscues.
The result is a very simple hand that can grasp a wide range of objects. It could become a platform for future household and service robots, where the ability to grasp different objects is important.
http://www.seas.harvard.edu/news-events/news-clips/cockroach-inspires-robotic-hand-to-get-a-grip/image_mini
Full article: Cockroach Inspires Robotic Hand To Get A Grip (http://www.insidescience.org/research/cockroach-inspires-robotic-hand-to-get-a-grip)
"Surprisingly, Howe said, their inspiration came from cockroach legs."
Rather than build a robotic hand that could avoid mistakes while grasping a variety of objects, researchers build one that can correct mistakes on the fly, which is what humans do.
Despite its four-fingered form, the resulting hand has several human characteristics. At rest, its joints are opened from 25 to 45 degrees, and the joints at the base (our palm) are more flexible than the joints of the fingers. Dollar also added sensors to detect when a finger touches an object and the angle of the joints. While the hand automatically adjusts for many small errors, the sensors enable it to compensate for larger miscues.
The result is a very simple hand that can grasp a wide range of objects. It could become a platform for future household and service robots, where the ability to grasp different objects is important.
http://www.seas.harvard.edu/news-events/news-clips/cockroach-inspires-robotic-hand-to-get-a-grip/image_mini
Full article: Cockroach Inspires Robotic Hand To Get A Grip (http://www.insidescience.org/research/cockroach-inspires-robotic-hand-to-get-a-grip)
nanofrog
Apr 14, 08:57 AM
ARC-1880LP
http://eshop.macsales.com/item/Areca/ARC1880LP/
You don't need to worry about Low Profile versions for the Mac Pro, so others are viable options (say the ARC-1880i all the way to the ARC-1880ix24).
ATTO Technologies is another company to look into (both offer 6Gb/s, bootable in BIOS and EFI based systems, work in multiple OS's, and have additional features not found on other cards). But ATTO's products are more expensive (good if you're new to hardware RAID controllers, as they're located in New York State so the Support Staff speak English natively), and on some models, Areca has an advantage (namely those that use a DIMM slot for the cache - none of ATTO's products do).
Areca's support staff do speak English (phone or email), but it's a 2nd language (based in Taiwan). So deciphering their response can be challenging at times.
Or is there more sata/power connectors there or can I buy/connect more?
The 2009/10 systems use a single backplane connector per ODD bay, so you'd need to use a Y splitter off of that (example (http://www.monoprice.com/products/product.asp?c_id=102&cp_id=10226&cs_id=1022604&p_id=5184&seq=1&format=2) if you don't need to retain the data signal off of the ODD backplane connector).
If you do need to retain the data connection, there's a way to do that too, but it will take a bit of effort on your part (means getting a couple of off the shelf cables and splicing the power wires together <backplane extension cable (http://industrialcomponent.com/oem/sataext12.html) + SATA Y splitter>; no mods to the system, so your warranty will remain in tact :)).
With this card I can connect both the 4x 3TB HDD RAID5 volume and 2x 6G SSD (non-raid) to it at same time.
Yes.
You can run multiple arrays or arrays + single disks via Pass Through mode. You cannot run a JBOD (concatenation) + RAID simultaneously though (must select between RAID or JBOD mode).
Also does it get messy cable wise when you don't use the apple raid card and run the SAS expanders to the drives? How did you go about flashing the card to EFI firmware ?
SAS expanders are easy cable wise (and no different between any computer for the same configuration and equipment).
All of Areca's settings, including flashing the firmware, are done via a web browser (BTW, Safari tends to fail for this, so use another browser, such as Firefox).
If you chose an ATTO product, it installs it's own interface application.
Which other 6G RAID cards can you recommend that I can connect 4x HDD in RAID5 and 2x 6G SSD's (non-raid) to, if there's a good one that takes advantage of internal drive channels it would be a plus.
The only card that can use PCB traces with the HDD bays, is the Apple RAID Pro.
All 3rd party cards require an adapter, which you've found (maxupgrades.com adapter kit you located).
Care to post the instructions or link to the thread with details on flashing the Areca card that NANOFROG gave you?
See above.
The EFI firmware (EBC actually), can be found on the disk provided with the card, or on the support site (you will have to dig a bit, but it's there). Then install it via a browser (use Firefox, as there's been too many instances where Safari has failed - including multiple versions of it).
How many RAID volumes can you configure using the one Areca controller using the internal ports? I am guessing all drives that connect using the ( MiniSAS- SATA 4x multiplier). So for two internal 6G ports on the RAID controller (8 drives in any number of RAID configs). I want to run a 4x HDD RAID5 and 2x SSD's in non raid off the one controller. Maybe even go for the 1880-ix with external RAID support for a 3rd external RAID1 volume, all of the same controller. Wondering how much RAM I will need in this case, would 512MB default be enough you think?
The # of volumes = however many you want (all of the 1880 series can actually run 128 disks via SAS expanders). You can do this via an internal to external cable (http://www.pc-pitstop.com/sas_cables_adapters/8887-1M.asp) (stick to 1.0 meter with SATA disks, or it won't be stable). Or just use these cables for a 1:1 port to disk ratio if you wish in an external SAS enclosure.
Not sure if you're asking, but you're not stuck to even numbers once you exceed the minimum disk count (i.e. minimum for RAID 5 = 3 members).
512MB would be enough, as you're not using that many disks (only functional during writes, not reads). More can improve your write throughputs, but I'm not sure of your file sizes, or if you'll be adding more disks (via expanders or in a 1:1 ratio).
You could do without the RAID-card altogether and just install 4 drives in the bays in the Mac Pro and use the ZFS filesystem (http://code.google.com/p/maczfs/) to make a dynamic stripe in RAID-Z, so you will get RAID-5 like performance but with better protection and data integrity.
RAID-5 is prone to something called the "RAID-5 write hole" in case of a power outage, something RAID-Z specifically is designed to handle.
Just listing this as another option.
For software implementations of parity arrays, you're absolutely right. RAID 5 wouldn't be the way to go. But a hardware RAID controller has a hardware solution to the problem. :)
Funny thing, as I am running ZFS as we speak on my Mac Pro and several servers.
If you clicked the link I provided you could even download it and install it in Mac OS X ;)
Also ZFS is returning big time for Mac OS X come June/July with a full up-to-date implementation of ZFS, called ZFS-410 by Ten's Complement LLC (http://tenscomplement.com/).
Ironically, one of the engineers behind ZFS-410 was the technical lead behind the original HFS+ filesystem and one of the persons porting ZFS to Mac OS X until Apple ditched it. You can find a good read about it here (http://arstechnica.com/apple/news/2011/03/how-zfs-is-slowly-making-its-way-to-mac-os-x.ars)
Interesting.
http://eshop.macsales.com/item/Areca/ARC1880LP/
You don't need to worry about Low Profile versions for the Mac Pro, so others are viable options (say the ARC-1880i all the way to the ARC-1880ix24).
ATTO Technologies is another company to look into (both offer 6Gb/s, bootable in BIOS and EFI based systems, work in multiple OS's, and have additional features not found on other cards). But ATTO's products are more expensive (good if you're new to hardware RAID controllers, as they're located in New York State so the Support Staff speak English natively), and on some models, Areca has an advantage (namely those that use a DIMM slot for the cache - none of ATTO's products do).
Areca's support staff do speak English (phone or email), but it's a 2nd language (based in Taiwan). So deciphering their response can be challenging at times.
Or is there more sata/power connectors there or can I buy/connect more?
The 2009/10 systems use a single backplane connector per ODD bay, so you'd need to use a Y splitter off of that (example (http://www.monoprice.com/products/product.asp?c_id=102&cp_id=10226&cs_id=1022604&p_id=5184&seq=1&format=2) if you don't need to retain the data signal off of the ODD backplane connector).
If you do need to retain the data connection, there's a way to do that too, but it will take a bit of effort on your part (means getting a couple of off the shelf cables and splicing the power wires together <backplane extension cable (http://industrialcomponent.com/oem/sataext12.html) + SATA Y splitter>; no mods to the system, so your warranty will remain in tact :)).
With this card I can connect both the 4x 3TB HDD RAID5 volume and 2x 6G SSD (non-raid) to it at same time.
Yes.
You can run multiple arrays or arrays + single disks via Pass Through mode. You cannot run a JBOD (concatenation) + RAID simultaneously though (must select between RAID or JBOD mode).
Also does it get messy cable wise when you don't use the apple raid card and run the SAS expanders to the drives? How did you go about flashing the card to EFI firmware ?
SAS expanders are easy cable wise (and no different between any computer for the same configuration and equipment).
All of Areca's settings, including flashing the firmware, are done via a web browser (BTW, Safari tends to fail for this, so use another browser, such as Firefox).
If you chose an ATTO product, it installs it's own interface application.
Which other 6G RAID cards can you recommend that I can connect 4x HDD in RAID5 and 2x 6G SSD's (non-raid) to, if there's a good one that takes advantage of internal drive channels it would be a plus.
The only card that can use PCB traces with the HDD bays, is the Apple RAID Pro.
All 3rd party cards require an adapter, which you've found (maxupgrades.com adapter kit you located).
Care to post the instructions or link to the thread with details on flashing the Areca card that NANOFROG gave you?
See above.
The EFI firmware (EBC actually), can be found on the disk provided with the card, or on the support site (you will have to dig a bit, but it's there). Then install it via a browser (use Firefox, as there's been too many instances where Safari has failed - including multiple versions of it).
How many RAID volumes can you configure using the one Areca controller using the internal ports? I am guessing all drives that connect using the ( MiniSAS- SATA 4x multiplier). So for two internal 6G ports on the RAID controller (8 drives in any number of RAID configs). I want to run a 4x HDD RAID5 and 2x SSD's in non raid off the one controller. Maybe even go for the 1880-ix with external RAID support for a 3rd external RAID1 volume, all of the same controller. Wondering how much RAM I will need in this case, would 512MB default be enough you think?
The # of volumes = however many you want (all of the 1880 series can actually run 128 disks via SAS expanders). You can do this via an internal to external cable (http://www.pc-pitstop.com/sas_cables_adapters/8887-1M.asp) (stick to 1.0 meter with SATA disks, or it won't be stable). Or just use these cables for a 1:1 port to disk ratio if you wish in an external SAS enclosure.
Not sure if you're asking, but you're not stuck to even numbers once you exceed the minimum disk count (i.e. minimum for RAID 5 = 3 members).
512MB would be enough, as you're not using that many disks (only functional during writes, not reads). More can improve your write throughputs, but I'm not sure of your file sizes, or if you'll be adding more disks (via expanders or in a 1:1 ratio).
You could do without the RAID-card altogether and just install 4 drives in the bays in the Mac Pro and use the ZFS filesystem (http://code.google.com/p/maczfs/) to make a dynamic stripe in RAID-Z, so you will get RAID-5 like performance but with better protection and data integrity.
RAID-5 is prone to something called the "RAID-5 write hole" in case of a power outage, something RAID-Z specifically is designed to handle.
Just listing this as another option.
For software implementations of parity arrays, you're absolutely right. RAID 5 wouldn't be the way to go. But a hardware RAID controller has a hardware solution to the problem. :)
Funny thing, as I am running ZFS as we speak on my Mac Pro and several servers.
If you clicked the link I provided you could even download it and install it in Mac OS X ;)
Also ZFS is returning big time for Mac OS X come June/July with a full up-to-date implementation of ZFS, called ZFS-410 by Ten's Complement LLC (http://tenscomplement.com/).
Ironically, one of the engineers behind ZFS-410 was the technical lead behind the original HFS+ filesystem and one of the persons porting ZFS to Mac OS X until Apple ditched it. You can find a good read about it here (http://arstechnica.com/apple/news/2011/03/how-zfs-is-slowly-making-its-way-to-mac-os-x.ars)
Interesting.
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