NEW G-Raid 2

Is anybody here that can answer me few questions about new G-Raid 2? Did anybody try it yet? I already emailed to G-Tech Support but I have no answer from them.
This is what I asked them:
“I am decided to buy G-RAID 2, for DV video editing on a Mac OS platform, but I have few questions:
1) Did you fix the previous problem? (unmounting, etc)
2) What kind of HD do you use for G-RAID2? What brand?
3) Will you make the Stealth version soon? Is Titanium any better? I am worried about heating issues.”
Thank,
Dan

Sorry, I missed the point.
It means this (here's what G-Tech told me):
1) The un-mounting issue has been resolved. If you have any old product with this issue, please let us know... and we can fix it immediately. We located the issue, and it was resolved on new product months ago. The GRAID2 works great;-)
2) Yes, we use only Hitachi drives. They are the only ones that pass all our tests.
3) As for the stealth version, there were not performance or heating differences between the two units. We are currently considering bringing back the stealth units, but no commitments have been made as of yet.

Similar Messages

About the new G-Raid 2

Is anybody here that can answer me few questions about new G-Raid 2? Did anybody try it yet? I already emailed to G-Tech Support but I have no answer from them.
This is what I asked them:
“I am decided to buy G-RAID 2, for DV video editing on a Mac OS platform, but I have few questions:
1) Did you fix the previous problem? (unmounting, etc)
2) What kind of HD do you use for G-RAID2? What brand?
3) Will you make the Stealth version soon? Is Titanium any better? I am worried about heating issues.”

answered

Drives just stop with new Xserve raid

I have just set up a new Xserve on 10.4.5 with 2 x 400 gig drives.The raid has been set up by the book twice and the drives were formated aswell, the problem is that after the raid is set up i then test it by copying lots of data to it from various machine across the network and after about 10 gigs of copying the drives just stop, on their own(not in a raid) the drives work fine.
Any suggestions ?
Thanks
Matt

Hello, Diego Arana and welcome to the AppleBoards,
+I don´t know what OS the Xserve RAID has, I just know that it is the first one.+
The Xserve RAID has no operating system on it. It is essentially a very fancy external hard drive that attaches over fibre channel. It does a firmware version that can be updated but that is the closest thing to an OS that it has. (Unless you're adding drives you can probably leave that alone.) The XRAID is controlled over either of the ethernet ports using the RAID Admin program - if you don't have a copy download it from Apple's support site.
+Is it possible to connect a New MacPro (Early 2009) to a Xserve RAID (RAID 720G/4DRIVE/2X2GB FC) via fiber channel?+
Yes, I have done this and it is straightforward. The fibre will negotiate down to 2GB, of course, but it does just work. If you're talking about the Apple shipped fibre card it is (at least in the states) shipped with SFP connectors that match the SFP connectors that are on the Xserve RAID and you just use the copper cabling (not the optical fibre) to connect them unless you are going a very long distance. If you order the card (again in the states) with Xserve the copper cables are included when they ship it.
If you do have optical connections you can buy optical to copper/SFP converters. I have several of these on my fibre switch and they are not more complicated than adding the adaptor and plugging them in - at least on the fibre switch. I have never actually hooked up an XRAID to optical fibre but this is pretty common in XSAN environments with longer "cable" runs.
HTH,
=Tod

Can I and should I move my home directory to my new Thunderbolt RAID drive?

I have just purchased a Thunderbolt Promoise Pegasus Raid set to Raid5. I have never owned a RAID device before so i apologise if these questions seem strange or rudimentary.
I am running an internal 7200 RPM 1TB disc but I have heard that the Thunderbolt throughput is faster than even my internal drive. Is that the case?
If so...
Would it be possible/wise for me to move my home directory to the RAID?
Would it be possible/wise for me run the entire system from the RAID?
Finally, if I keep the system/home directory on the RAID, can I/shoud I use the RAID for Time Machine Backups?
Thanks in advance for any thoughts

Here's what I did:
Copied my home directory to the RAID (not NAS incidentally, but RAID via thunderbolt)
System Prefernces -> accounts
Unlock to make changes and control-click on the account you want to move.
In there you will see a home directory location. Change it to where your new home directory location is.
Restart.
You know it has worked if the new location icon is the familiar picture of a house.
Probably a good idea to have a fallback account you can log into in case something happens.
No issues with any software, plenty of room now on the internal drive ad everything works nice and snappy

Setting up my new CalDigit raid, best way?

So my CalDigit S2VRDuo 500Gb raid arrived today and I was about to install it but something made me stop. I am in the middle of a large project that will last until November. At present I have about 250 individual clips (HDV really can be a pain sometimes :)). My thought was to install the raid as a Raid 0 and then move all the files over from my 2nd internal (my usual capture disk). Of course wouldn't that condemn me to a weeks worth of reconnecting clips?
Any suggestions folks?

Two drives named the same thing will be no issue. BUT...make sure that you take the internal offline before opening FCP (just eject it...it will unmount) so you make sure that everything works. Then you can consider trashing things. OR...keeping it as backup in case you have a drive failure. I do that. Just name it something else after you transfer the data and FCP won't link to it.
But, if you did have to resort to reconnecting, once you find one or two things, FCP finds the others in the relative path.
I do get spiff from CalDigit and Matrox. Well, I get to use their products for a while. Loaners. I have to return them at some point, but I still get to use them.
Shane

New Server Raid Question

If when building a server I wish to have2 usable 500 gb virtual drives & (Old drive i already have)back up. My goal here is to get the best without wasting money. Is it better to:
1.) Raid 5 wit 3 500gb ssd's
2.) Raid 0 2 250gig ssd's for sbs 2011 +a raid 1 with 2 500gb hdd's for data.
3.) Create 2x raid 1 set ups one for the operating system (SSD) and one for data(HDD).
4.) Get a single 500 gb ssd for the operating system. Raid 1 for data on the HDDs.
5.) Get 2 500gb ssd and dont raid.

Ended up going with 3x 1tb 7200rpm sas drives on a hot swap backplane hooked to a adaptec controller w/ built in processor/ram yay!, ... SBS 2011 is installing now
I must say, MSI directions in all of thier broken english, are 100% better than supermicro. You all need to come out with some server boards! The server chassis didn't even come with directions and it had un-labeled pwr_i2c,an sas backplan, and unlabeled frt usb/ lights with which to contend. Once I downloaded the directions, they weren't too bad but no wiring diagrams or descriptions of what those wires were so I had to trace every single one... A good feeling when it all booted up and worked right the first time.

New G-raid 4tb is crashing fcp6 on fw800 playback

trying to run apple prores422 thru fw800 any ideas? Help?

Nope.
Perhaps if you tell us more, we might have more insight ...
re-
computer
ram
osx
qt
fcp
sequence
drive type
free space
and on and on ...
x

Moving MSI K8N Neo RAID.0 array to new MOBO (from Nforce4 Ultra + Sil3114!)

Hi folks!, my MSI K8N Neo4 Platinum is GONE , and I had 5 disks on it:
Disk 1: No RAID - OS - WinXP installed
Disk 2+3: RAID.0 on Nforce4 Ultra MCP controller (onboard)
Disk 4+5: RAID.0 on Sillicon Image Sil3114 controller (onboard)
Questions are:
1- Anyone knows if ANY CURRENT MSI motherboards model is RETRO COMPATIBLE with the legacy NFORCE4 controllers (with AMD CPU)?
-> In case not, any solution to access the RAID from the NForce4?
2- Since I think no current motherboards have Sillicon RAID controllers (if you know of any, please tell me), anyone knows any PCI controller to attach to the new motherboard COMPATIBLE with the Sil3114? (I read that the new Sillicon controllers are generally compatible with the old ones), so I can access the Disk 4+5.
Thank you!
Luis

Quote from: claudermilk on 21-August-09, 08:28:58
I feel your pain. I'm also interested in a mobo with a compatible nVidia controller. In my case, it's only a dead drive that was on the 3114 controller (OS) while the nVidia is full with a 0+1 array. Unfortuately Windows refuses every drive I offer it on the 3114.
I'm thinking on doing this, what do u think? :
1- For the Nforce4 array: Nvidia offical tech support said me that all new NVIDIA RAID controllers (both NFORCE/GEFORCE) are backwards-compatible with legacy controllers like the NFORCE4 Ultra I had, so in theory, a new one should "understand" the RAID array coinfiguration metadata stored on the disks, and no information would be lost. This is as long as the RAID BIOS version of both old and new MB is 9.xx...
So in this case I'l buy a new MB with a Geforce 8200 chipset (ASUS M3N78-VN with a Phenom II 710).
The only worry is how to verify WHICH RAID BIOS version I had on the defunct MB... any idea? Is the RAID BIOS inside the MB BIOS?
2- For the Sil3114 array: I'm buying a Lycom ST-127 PCI host and connecting it on the Geforce 8200 new MB, which essentially contains the same chipset brain as the original Silicon Image 3114 I had on the MSI MB.
In this case, I'd have the same logic controller for that array...
All disks are SATA.
Any thoughts? I'll keep you posted!
Thanks, :D
Luis

G-RAID with thunderbolt to Firewire adapter

Hi, I just bought a brand new Macbook Pro with Retina display. I also purchased a Thunderbolt to Firewire800 adapter with it to plug in the G-RAID mini disks I already had. WHen I try to plug the G-RAID mini in the TBtoFW adapter it make a regular beep and doesn't mount. Any clu on why this is happening?
The drives mounted perfectly on my 17in MBP and it works great on the MacPro I'm using right now.
THanks

It's beach use the FireWire to Thunderbolt adapter doesn't provide enough power. I've heard using two adapters with it plugged to both FireWire ports works. You plug one in, then the other.
I'm curios if the new G-Raid Mini is bus powered by USB 3. Or if you can plug in USB 3 and the adapter to get enough power. I only have 1 TB port on my Air.

RAID test on 8-core with real world tasks gives 9% gain?

Here are my results from testing the software RAID set up on my new (July 2009) Mac Pro. As you will see, although my 8-core (Octo) tested twice as fast as my new (March 2009) MacBook 2.4 GHz, the software RAID set up only gave me a 9% increase at best.
Specs:
Mac Pro 2x 2.26 GHz Quad-core Intel Xeon, 8 GB 1066 MHz DDR3, 4x 1TB 7200 Apple Drives.
MacBook 2.4 GHz Intel Core 2 Duo, 4 GB 1067 MHz DDR3
Both running OS X 10.5.7
Canon Vixia HG20 HD video camera shooting in 1440 x 1080 resolution at “XP+” AVCHD format, 16:9 (wonderful camera)
The tests. (These are close to my real world “work flow” jobs that I would have to wait on when using my G5.)
Test A: import 5:00 of video into iMovie at 960x540 with thumbnails
Test B: render and export with Sepia applied to MPEG-4 at 960x540 (a 140 MB file) in iMovie
Test C: in QuickTime resize this MPEG-4 file to iPod size .m4v at 640x360 resolution
Results:
Control: MacBook as shipped
Test A: 4:16 (four minutes, sixteen seconds)
Test B: 13:28
Test C: 4:21
Control: Mac Pro as shipped (no RAID)
Test A: 1:50
Test B: 7:14
Test C: 2:22
Mac Pro config 1
RAID 0 (no RAID on the boot drive, three 1TB drives striped)
Test A: 1:44
Test B: 7:02
Test C: 2:23
Mac Pro config 2
RAID 10 (drives 1 and 2 mirrored, drives 3 and 4 mirrored, then both mirrors striped)
Test A: 1:40
Test B: 7:09
Test C: 2:23
My question: Why am I not seeing an increase in speed on these tasks? Any ideas?
David
Notes:
I took this to the Apple store and they were expecting 30 to 50 per cent increase with the software RAID. They don’t know why I didn’t see it on my tests.
I am using iMovie and QuickTime because I just got the Adobe CS4 and ran out of cash. And it is fine for my live music videos. Soon I will get Final Cut Studio.
I set up the RAID with Disk Utility without trouble. (It crashed once but reopened and set up just fine.) If I check back it shows the RAID set up working.
Activity Monitor reported “disk activity” peaks at about 8 MB/sec on both QuickTime and iMovie tasks. The CPU number (percent?) on QT was 470 (5 cores involved?) and iMovie was 294 (3 cores involved?).
Console reported the same error for iMovie and QT:
7/27/09 11:05:35 AM iMovie[1715] Error loading /Library/Audio/Plug-Ins/HAL/DVCPROHDAudio.plugin/Contents/MacOS/DVCPROHDAudio: dlopen(/Library/Audio/Plug-Ins/HAL/DVCPROHDAudio.plugin/Contents/MacOS/DVCPROHD Audio, 262): Symbol not found: _keymgr_get_per_threaddata
Referenced from: /Library/Audio/Plug-Ins/HAL/DVCPROHDAudio.plugin/Contents/MacOS/DVCPROHDAudio
Expected in: /usr/lib/libSystem.B.dylib

The memory controllers, one for each cpu, means that you need at least 2 x 2GB on each bank. If that is how Apple set it up, that is minimal and the only thing I would do now with RAM is add another 2 x 2GB. That's all. And get you into triple channel bandwidth.
It could be the make and model of your hard drives. If they are seagate then more info would help. And not all drives are equal when it comes to RAID.
Are you new to RAID or something you've been doing? seems you had enough to build 0+1 and do some testing. Though not pleased, even if it works now, that it didn't take the one time.
Drives - and RAIDs - improve over the first week or two - which, before commiting good data to them - is the best time to torture, run them ragged, use Speedtools to break them in, loosen up the heads, scan for media errors, and run ZoneBench (and with 1TB, partition each drive into 1/4ths).
If Drive A is not identical to B, then they may deal with an array even worse. And no two drives are purly identical, some vary more than others, and some are best used in hardware RAID controller environments.
Memory: buying in groups of three. okay. But then adding 4 x 4GB? So bank A with 4 x 2GB and B with twice as much memory. On Mac Pro, 4 DIMMs on a bank you get 70% bandwidth, it drops down from tri-channel to dual-channel mode.
I studied how to build or put together a PC for over six months, but then learned more in the month (or two) after I bought all the parts, found what didn't work, learned my own short-comings, and ended up building TWO - one for testing, other for backup system. And three motherboards (the best 'rated' also had more trouble with BIOS and fans, the cheap one was great, the Intel board that reviewers didn't seem to "gork" actually has been the best and easiest to use and update BIOS). Hands on wins 3:1 versus trying to learn by reading for me, hands-on is what I need to learn. Or take car or sailboat out for drive, spin, see how it fares in rough weather.
I buy an Apple system bare bones, stock, or less, then do all the upgrades on my own, when I can afford to, gradually over months, year.
Each cpu needs to be fed. So they each need at least 3 x 1GB RAM. And they need raw data fed to RAM and cpu from disk drives. And your mix of programs will each behave differently. Which is why you see Barefeats test with Pro Apps, CINEBENCH, and other apps or tools.
What did you read or do in the past that led you to think you need RAID setup, and for how it would affect performance?
Photoshop Guides to Performance:
http://homepage.mac.com/boots911/.Public/PhotoshopAccelerationBasics2.4W.pdf
http://kb2.adobe.com/cps/401/kb401089.html
http://www.macgurus.com/guides/storageaccelguide.php
4-core vs 8-core
http://www.barefeats.com/nehal08.html
http://www.barefeats.com/nehal03.html

RAID is missing in Media Browser

RAID is missing from the Media Browser. I can see the RAID icon (AM VIDEO) in the bin but can see it in the file directory. Double clicking on the icon doesn't open the RAID. My work around is to place an alias of a directory needed from the RAID on the desktop.
RAID is an OWC Mercury Rack Pro and it's visible and fully functional in the finder. Problem occurs in CC and CC14
Mac Pro 5,1, 10.9.3

I've just had it happen too. A brand new OWC RAID 1 drive (less than a week old) has suddenly, under Pr 2014, lost the ability to see this drive. When it arrived I formatted it with Apple's Disk Utility. Adobe Premiere has been working fine until this version. Now Premiere cannot see this drive in media browser, while the Finder can, and DU reports no problems, and neither does Disk Warrier. The drive seems fine. But Adobe can't see it.
Given the variety of people discussing this, here and on other boards, I'm thinking that there is a bug with Media Browser. I now have to *reformat* my drive, which means hours of moving files off to another drive and back on. If this is a bug, we need to know what's happening! I will be *very* unwilling to upgrade to the next version of Adobe software given this situation!
Model Name: iMac
Model Identifier: iMac13,2
Processor Name: Intel Core i7
Processor Speed: 3.4 GHz
Number of Processors: 1
Total Number of Cores: 4
L2 Cache (per Core): 256 KB
L3 Cache: 8 MB
Memory: 16 GB
Boot ROM Version: IM131.010A.B05
SMC Version (system): 2.11f14
OS X 10.9.5 (13F34)
Graphics NVIDIA GeForce GTX 680MX 2048 MB

[Solved] Move Software RAID 5 Array From NAS To Arch

Edit: I probably never had a problem at all, the error in dmesg probably just scared me, because after I disconnected it I noticed that /dev/d127 was 8.1 TB, the exact size of my RAID array node in my NAS which was /dev/md0, I just overlooked it. I reconnected it to my pc and mounted /dev/md127 to /mnt/raid and got this wonderful sight!
[bran@ra ~]$ ls /mnt/raid
data lost+found meta sys
[bran@ra ~]$ ls /mnt/raid/data/
data ftproot module _NAS_Media _NAS_Piczza_ _NAS_Recycle_RAID _P2P_DownLoad_ stackable _SYS_TMP TV USBHDD
download htdocs Movies _NAS_NFS_Exports_ NAS_Public nzbget-downloads PLEX_CONFIG sys tmp USBCopy
I bought a Thecus N4520 a few months ago and it's ok but programs crash a lot and they're hard to debug, apps have to be updated manually and the whole thing is moderately underpowered. I'm trying to move the software RAID 5 array from the NAS to my desktop, the kernel seems to detect that there is a RAID array but all these drives aren't part of it. I'm pretty new to RAID and I'm just getting my feet wet with it.
When I try to assemble the RAID array, it just tells me that it isn't an md array. How can I get it to build my array?
[bran@ra ~]$ sudo mdadm --assemble /dev/sdb /dev/sdc /dev/sdd /dev/sde
mdadm: device /dev/sdb exists but is not an md array.
Found this little chunk of info in dmesg, it says that the md devices have unknown partition tables.
[ 3.262225] md: raid1 personality registered for level 1
[ 3.262483] iTCO_wdt: Intel TCO WatchDog Timer Driver v1.10
[ 3.262508] iTCO_wdt: Found a Patsburg TCO device (Version=2, TCOBASE=0x0460)
[ 3.262585] iTCO_wdt: initialized. heartbeat=30 sec (nowayout=0)
[ 3.262933] md/raid1:md126: active with 4 out of 4 mirrors
[ 3.262961] md126: detected capacity change from 0 to 536850432
[ 3.263272] RAID1 conf printout:
[ 3.263274] --- wd:4 rd:4
[ 3.263276] disk 0, wo:0, o:1, dev:sdc3
[ 3.263276] disk 1, wo:0, o:1, dev:sdb3
[ 3.263277] disk 2, wo:0, o:1, dev:sdd3
[ 3.263278] disk 3, wo:0, o:1, dev:sde3
[ 3.263501] md: bind<sde4>
[ 3.264810] md: bind<sdb2>
[ 3.268262] async_tx: api initialized (async)
[ 3.272632] md: raid6 personality registered for level 6
[ 3.272636] md: raid5 personality registered for level 5
[ 3.272637] md: raid4 personality registered for level 4
[ 3.272905] md/raid:md127: device sdb2 operational as raid disk 1
[ 3.272908] md/raid:md127: device sde2 operational as raid disk 3
[ 3.272910] md/raid:md127: device sdd2 operational as raid disk 2
[ 3.272911] md/raid:md127: device sdc2 operational as raid disk 0
[ 3.273211] md/raid:md127: allocated 0kB
[ 3.273241] md/raid:md127: raid level 5 active with 4 out of 4 devices, algorithm 2
[ 3.273243] RAID conf printout:
[ 3.273244] --- level:5 rd:4 wd:4
[ 3.273245] disk 0, o:1, dev:sdc2
[ 3.273246] disk 1, o:1, dev:sdb2
[ 3.273247] disk 2, o:1, dev:sdd2
[ 3.273248] disk 3, o:1, dev:sde2
[ 3.273273] md127: detected capacity change from 0 to 8929230716928
[ 3.273322] RAID conf printout:
[ 3.273326] --- level:5 rd:4 wd:4
[ 3.273329] disk 0, o:1, dev:sdc2
[ 3.273331] disk 1, o:1, dev:sdb2
[ 3.273332] disk 2, o:1, dev:sdd2
[ 3.273360] disk 3, o:1, dev:sde2
[ 3.283617] md126: unknown partition table
[ 3.309239] md127: unknown partition table
[ 3.312660] md: bind<sdb4>
[ 3.318291] md/raid1:md124: not clean -- starting background reconstruction
[ 3.318296] md/raid1:md124: active with 4 out of 4 mirrors
[ 3.318333] md124: detected capacity change from 0 to 10736291840
[ 3.318385] RAID1 conf printout:
[ 3.318391] --- wd:4 rd:4
[ 3.318395] disk 0, wo:0, o:1, dev:sdc4
[ 3.318398] disk 1, wo:0, o:1, dev:sdb4
[ 3.318402] disk 2, wo:0, o:1, dev:sdd4
[ 3.318405] disk 3, wo:0, o:1, dev:sde4
[ 3.319890] md124: unknown partition table
[ 3.323462] md: bind<sde1>
[ 3.338094] md/raid1:md125: active with 4 out of 4 mirrors
[ 3.338225] md125: detected capacity change from 0 to 2146414592
[ 3.338253] RAID1 conf printout:
[ 3.338258] --- wd:4 rd:4
[ 3.338262] disk 0, wo:0, o:1, dev:sdc1
[ 3.338266] disk 1, wo:0, o:1, dev:sdb1
[ 3.338268] disk 2, wo:0, o:1, dev:sdd1
[ 3.338271] disk 3, wo:0, o:1, dev:sde1
Here's my full dmesg
mdadm.conf
# The designation "partitions" will scan all partitions found in /proc/partitions
DEVICE partitions
ARRAY /dev/md127 metadata=1.2 name=(none):0 UUID=d1d14afc:23490940:a0f7f996:d7b87dfb
ARRAY /dev/md126 metadata=1.2 name=(none):50 UUID=d43d5dd6:9446766e:1a7486f4:b811e16d
ARRAY /dev/md125 metadata=1.2 name=(none):10 UUID=f502437a:d27d335a:d11578d5:6e119d58
ARRAY /dev/md124 metadata=1.2 name=(none):70 UUID=ea980643:5c1b79e8:64f1b4cb:2462799b
Last edited by brando56894 (2014-04-21 22:51:01)

Sorry I numbered them to show the flow of information, this was also just a place for me to store info as I worked through it. I managed to get it to work by creating a partition that takes up the whole drive and is actually 22 GB larger than all the other drives (since I found out that the had root, swap and home partitions that are no longer needed).
I should be able to resize the other partitions without a problem, correct? They're EXT4. Should I unmount the raid array and do them individually, remount the array, let it sync and do the next? Or just unmount the array, resize all of them, mount it and let it sync?

Mac OS X 10.4 - Software RAID 10???

Hello All...
As a motion graphics artist by trade and a musician at night, I am constantly faced with the on-going dilemma of my storage needs. As you may probably already know, these two activities eat up drive space and require a speedy storage solution as well.
Here's my current setup:
- PowerMac G5 Dual 2GHz (PCI-X) w/ 3GB of RAM.
- Sonnet Tempo-X eSATA 4x4 PCI-X card.
- MacGurus Burly 4 bay SATA enclosure.
- 2 250GB WD drives in the Burly enclosure.
I have the two 250GB WD drives in the external SATA enclosure software-RAIDed together to form one RAID 0 (striped) volume, using the OS X disk utility RAID feature. While that has resulted in an excellent, fast, big disk... I am starting to run into errors, and starting to lose sleep over the fact that the current setup is not redundant / reliable.
My initial solution was to buy two more disks, RAID them together as another striped volume and run backups from the first two-disk WD striped volume to the new striped RAID. So, four disks, two striped raids with two disks each.... But when I called Sonnet Tech Support, the support guy said that OS X 10.4 has support for RAID 10. That changes everything! If I could fill the Burly enclosure with 4 of the same disks and software RAID 10 them together, I'd be in business... I think...
Does OS X 10.4 really allow you to create a software RAID 10???
If so, do you think this is the most ideal solution for what I'm working with?
Keep in mind, I'm working with a low budget. No, XServes/XServe-RAID is NOT an option!
Any input is greatly appreciated!
TIA

Hi, noka.
Yes, it supports RAID 10. See "Disk Utility 10.5 Help: Protecting your data against hardware failure with a mirrored RAID set."
However, you may not get the performance you expect.
FWIW and IMO, unless one is running a high-volume transaction server with a 99.999% ("Five Nines") availability requirement, RAID is overkill. For example, unless you're running a bank, a brokerage, or a major e-commerce site, you're probably spending sums of time and money with RAID that could be applied elsewhere.
RAID is high on the "geek chic" scale, low on the practicality scale, and very high on the "complex to troubleshoot" scale when problems arise. The average user, even one in your lines of business, is better served by implementing a comprehensive Backup and Recovery solution and using it regularly.
Good luck!
Dr. Smoke
Author: Troubleshooting Mac® OS X
Note: The information provided in the link(s) above is freely available. However, because I own The X Lab™, a commercial Web site to which some of these links point, the Apple Discussions Terms of Use require I include the following disclosure statement with this post:
I may receive some form of compensation, financial or otherwise, from my recommendation or link.

Raid Card, what to look for in a card?

Hi guys,
Im looking for help on what to look for in a Raid card. Im new to Raid, but i have read the tweakers pages and it seems like the way forward.
Im a full time editor working with AVC-Intra footage doing fast cuts. Im about to ditch my 2008 mac pro and build a up to date PC around the i7 4930k. Im planning on running 8x3-4tb drives for footage; raid 5, 3x3tb raid 3 for exports, maybe 2x256 ssd raid 0 for boot, 2x3tb drive for page file and media cache, and maybe 3x3tb for stock footage raid 0.
Im totally lost in what to look for in a Raid card?
Cheers Ryan

For 13 drives is there a cheaper option?
Yes, Areca 1882ix-16, 1264IL-16, Intel RS2WG160, LSI 9260-16i - or for that matter, any RAID controller with 13+ internal connections. There are much cheaper controllers from Highpoint and others, as well.
If your next question is, is it worth it going cheaper? ...Usually not for me personally - at least certainly not with Highpoint or other entry level controllers with subpar support and all kinds of performance and reliability problems. Even Tier 1 controllers aren't exempt from them.
That said, I am curious about Intel and LSI controllers I listed above. The LSI one especially so given the availability of SSD caching and other neat features.
Hope this helps.

Need help in creating RAID 5

Hi everyone,
i'm fairly new to RAID scene and i need help for creating RAID 5 with 8 disk's.
I have HP ProLiant DL380 G6 with 8 disk's, each 500 GB.
i'm trying to create RAID 5 and to have one spare disk. I have made array from 7 disk and then create logical drive.
the last disk (8-th) i used as spare.
up to now i think i'm ok???
what confuse me is:
7 HDD X 500GB= 3500GB
after creating array i get 3200 GB, where i lose 300 GB??
after creating logical drive i get 2700 GB, where i lose 500 GB???
from 2700GB i give 150GB for system partition and for data storage i have only 2550 GB.
Why i lose 800GB??
Can someone explain me how RAID 5 works, do i create it correctly and why i lose so much space???
Is there other way to create RAID 5 without losing so much space?
Thanks you in advnce.

The first 'loss' you encounter (300MB) is due to megabyte counting/rounding. A 500GB disk contains about 500.000.000 bytes. This quite a bit less than if counted properly using binary. you loose about 24288000 bytes per disk this way!
http://en.wikipedia.org/wiki/Mibibyte |
http://en.wikipedia.org/wiki/Megabyte
the second loss is due to how raid works.in raid 5 data is written to multiple disks to improve reliability. the simplies t form uses 3 disks: a write will cause half of the data to be written to disk 1, half to disk 2 and the XOR of both datahalfs to disk
3. In this scenario you will loose 33% of storage space and you can loose up to one of 3 disks.
By adding more disks, data can be spread more and the ratio available/raw will increase, or you can write aditionnal crc data and increase resliency for failures.
http://en.wikipedia.org/wiki/RAID
To check the exact algoritmes using on you RAID adapter, I would recommend contacting the vendor (or checking their support site) From your numbres, I do not think you will be able to configure RAID 5 on the same disks and having more available
space for your data.
MCP/MCSA/MCTS/MCITP

NEW G-Raid 2

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