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PERC 5/i RAID Card: Tips and Benchmarks - Page 561

post #5601 of 6872
Okay, so I wake up this morning and try to access my server disks that are run through my Perc 5. I have two RAID 5 arrarys (one 4x1TB arrary and one 4x2TB arrary).

The 4x1TB arrary shows one physical disc failure. currently in the process of rebuilding that individual drive because I don't think the drive failed.

The 4x2TB arrary shows one failed physical disc and one missing physical disc. Well, again I don't think that the one disc has failed and I know that the other "missing" disc is not missing. Any thoughts on how to go about fixing this second arrary????
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Will of D
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post #5602 of 6872
Quote:
Originally Posted by sidewinder69 View Post
oh another thing, my I swaped a failed drive on the 2nd array,
-set the drive to 'replace failed or removed drive'
-drive goes offline so i set it to online
-the array went from degraded to online
-now it is doing a background initialization
So is the array in the process of rebuilding?
Ive never seen an array go to Background Initialization after replacing a disk, on my 6/i when i replace a dead disk it just shows me that its rebuilding.



Edited by DJZeratul - 8/27/11 at 3:39pm
    
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post #5603 of 6872
Quote:
Originally Posted by UnknownDevice View Post
Can you please tell whats the driver your using ?
I updated the firmware on a Perc5/i and then a clean install of 2008 R2 SP1 and its suposed to have a built in driver but the driver says it cannot start...

Edit: Nevermind got to go back to dell firmware :S
Looks like on a clean install with 2008 R2 SP1 x64 the driver doesnt load, tried different megasas driver and no luck.
When i flashed the new firmware 7.01.0083 on the previous install evrything was fine and no errors :|
dude I had so many problems with drivers! with dell or LSI firmware on win ultimate x 64. I tried 3 mobo and it only worked on one. and the one it loaded the drivers correctly i had to put in a PCI express x1 (got a riser) cuz it wouldnt work on the x16 slot. a pain in the a$$.

If you need any further info I can show you my drivers.
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post #5604 of 6872
Quote:
Originally Posted by Carlitos714 View Post
dude I had so many problems with drivers! with dell or LSI firmware on win ultimate x 64. I tried 3 mobo and it only worked on one. and the one it loaded the drivers correctly i had to put in a PCI express x1 (got a riser) cuz it wouldnt work on the x16 slot. a pain in the a$$.

If you need any further info I can show you my drivers.
Thanks you for your help, but as i said i got back to 5.2.2 from Dell and after that no driver problems, the 2008 R2 SP1 X64 has drivers and they seem to work fine.
I was also having boot hangups with the lsi firmware.
[]
post #5605 of 6872
Quote:
Originally Posted by runnin17 View Post
Okay, so I wake up this morning and try to access my server disks that are run through my Perc 5. I have two RAID 5 arrarys (one 4x1TB arrary and one 4x2TB arrary).

The 4x1TB arrary shows one physical disc failure. currently in the process of rebuilding that individual drive because I don't think the drive failed.

The 4x2TB arrary shows one failed physical disc and one missing physical disc. Well, again I don't think that the one disc has failed and I know that the other "missing" disc is not missing. Any thoughts on how to go about fixing this second arrary????
Okay here is an update. The first 4x1tb arrary is now working after rebuilding that individual drive. I need help on the second arrary. Another thing that shows up when I first boot is that there is a foreign configuration found. The foreign config is showing up on one of the drives on the second arrary.

I need to know how to go about fixing this. I am not going to do anything to the second arrary until someone has a suggestion
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Will of D
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post #5606 of 6872
Quote:
Originally Posted by jjwa View Post
I am considering a PERC 6/i with BBU, to run 8x2TB in RAID-6.
Cheaper alternative is PERC 5/i*, to run 4x2TB 4x1TB in two RAID-5 arrays.
(*probably with BBU, possibly with 512MB RAM upgrade)
PERC 6/i with 256MB on board cache is faster than PERC 5/i with 512MB cache.
Quote:
- What kind of advantages would 512MB of controller memory give compared to 256MB?
Speed Bigger cache = more data from/to drives.
Quote:
I know the 5/i is upgradable, I am not sure about the 6/i.
PERC 6/i can't be upgraded - onboard cache - you can only upgrade PERC 6/e.
Quote:
But I am curious about the advantages anyway, because there's a chance I choose for 5/i with two RAID-5 arrays, 4x1TB and 4x2TB.
Like I said before - PERC 6 is faster than PERC 5 - different design:
http://www.overclock.net/raid-contro...ml#post6303030
Quote:
- Does anyone have experience with mixed drives in an array on these PERC cards?
[...]
- Can I run two different arrays on the same set of disks?
No - when you create volume - you are "locking" drives for selected type of the RAID level - you can't mix different RAID levels on the same physical drives - with PERC controllers.
Quote:
Edit:
I have just won an auction on eBay for a Perc 6/i . 105GBP/118Euro (bought it from the UK, I am in The Netherlands).
Quite nice But you should start looking few days earlier There was better deal
Quote:
Any good tips on where to get a battery for a decent price (in Europe)?
On eBay
post #5607 of 6872
Quote:
Originally Posted by DJZeratul View Post
[...]
Anyone ever seen anything like this/have any advice?
Check power cables - maybe they are too thin for the current needed by the drives/backplane ?
Quote:
Originally Posted by RobiNet View Post
You should always check the length and quality of power cables
I just discovered, that it's not good idea to use too many daisy chained cheap IDE splitters



Shorter IDE splitter with thicker cables - and everything starts working
post #5608 of 6872
Quote:
Originally Posted by RobiNet View Post
PERC 6/i with 256MB on board cache is faster than PERC 5/i with 512MB cache.

Speed Bigger cache = more data from/to drives.

PERC 6/i can't be upgraded - onboard cache - you can only upgrade PERC 6/e.

Like I said before - PERC 6 is faster than PERC 5 - different design:
http://www.overclock.net/raid-contro...ml#post6303030

No - when you create volume - you are "locking" drives for selected type of the RAID level - you can't mix different RAID levels on the same physical drives - with PERC controllers.

Quite nice But you should start looking few days earlier There was better deal

On eBay
Ah great, someone answered! Thanks .

Useful answers, and now extra happy I bought the 6/i, hehe. That is an interesting graphic, showing the PCI-E will be my bottleneck. (Sorry for not reading ~5600 posts first . Some day (or week?) I will.)

I had already been thinking these days that maybe I should get a new motherboard with faster/more PCI-E ports to run my RAID in (I also run a gaming graphics card that will always take a 16x slot and have a cooler huge enough to steal 2 slots of whatever is below it.). I may even be able to keep using my Adapted 3405 too. The fastest port I have available for RAID now is a 16x that has 4x lanes. For a 4-HDD setup that probably doesn't bottleneck anything except from-cache things, but with 8 drives, it really would be better to upgrade. Plus, I have read that PCI-E versions 1.x and 2.x all has overhead of 10~20% (PCI-E versions 3.x only 1~3%), meaning the 1GB/sec for PCI-E 1.0 x4 lanes will probably start to bottleneck at something like 0.8GB/sec (and 8x PCI at 1.6GB/sec).

For the 'mixed drives', (a question separate from the one about mixed raid levels) I meant different types and brands of drives in the same array (that is running only one RAID level ). If you have an answer to that one too, I would be real happy . Because with the i/6 bought, I am starting to think about what kind of setup I should run . Wondering if I really should or really should not run a set of very different drives in the same array. And I have so much storage space taken up that I can't just backup and empty the drives to try it out. Here's my original quote again, for details:

Quote:
Originally Posted by jjwa View Post
- Does anyone have experience with mixed drives together in an array on these PERC cards?
Any idea if I can expect any problems, and what kind? I have 4 very different 2TB drives, (currently not running them in any kind of RAID,) but I would like to run RAID-5 with them, and later possibly (gradually, or all at once) change it to 8x 2TB in RAID-6.

These are my current 2TB drives:
2x Seagate Barracuda LP (ST32000542AS) (5900rpm, SATA300, 32MB cache)
1x Seagate Barracuda Green 5900.3 (ST2000DL003-9VT166) (5900rpm, SATA600, 64MB cache)
1x Hitachi Deskstar 7K2000 (HDS722020ALA330) (7200rpm, SATA300, 32MB cache)
Different brands, types, SATA versions, different amounts of cache, even different rotation speeds.

I know that in case of mixed drives in an array, they will all work as slow as the slowest drive, and be as small as the smallest drive, but other than that, I am not sure what other reasons there are for recommending for using only 100% similar drives in RAID. Selling these to buy a bunch of new same-type ones would be kind of expensive with no gain in capacity.
I had already read that the 6/i was not upgradable in memory, and I have found a battery on Ebay I ordered . Now I have to wait, see if those webs-people won't just take my money and run off, instead of sending me my stuff .

(I suck at making short posts .)
post #5609 of 6872
Quote:
Originally Posted by jjwa View Post
I had already read that the 6/i was not upgradable in memory, and I have found a battery on Ebay I ordered . Now I have to wait, see if those webs-people won't just take my money and run off, instead of sending me my stuff .
I won't help you about mixing drives in one volume.
I think it would be no problem with Intel Matrix - but I'm not sure if PERC will give you choice to select so different drives for the same volume

Don't worry about shopping on eBay Buyers have better protection than sellers, if something go wrong - and you can prove that it's seller's fault - 100% you will get your money back.
post #5610 of 6872
Quote:
Originally Posted by RobiNet View Post
I won't help you about mixing drives in one volume.
I think it would be no problem with Intel Matrix - but I'm not sure if PERC will give you choice to select so different drives for the same volume

Don't worry about shopping on eBay Buyers have better protection than sellers, if something go wrong - and you can prove that it's seller's fault - 100% you will get your money back.
Cool . Happy to hear that about eBay.

I am expecting it will allow me to select the drives, and I expect it will build the array/volume. But I am not sure if it will give me terrible performance, or regularly drop (100% functional) drives out of the array, or for some reason make the drives themselves less reliable (I have read some weird stuff about things like spindle speeds in adjacent drives that all sounded very mythical my layman's ears). And I now realize that NCQ might be extra helpful here, extra carefully planning the (differently speeded) rotations and drive head movements...

I wish I had 4 extra 2TB drives, so I could play around with all of this while not endangering my data ^^.
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