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PERC 5/i RAID Card: Tips and Benchmarks - Page 597

post #5961 of 6872
Quote:
Originally Posted by Kaishi View Post

....
However, my plan is to convert that server into a VM-host. It has already been doing some light VM work, but I'm going to kick it up a notch (and put my systems on an ActiveDirectory Domain for Kerberos authentication). I intend to store my VHDs on the Perc 5/i's array, but I may convert it to a RAID10 or a RAID50 (does the 5/i support 50?)
Should I replace my Perc 5/i with a Perc 6/i? I'm seeing them on ebay for $90 and that sounds reasonable to me. I'm used to native LSI cards now (my OpenIndiana box runs a pair of LSI cards linked to backplanes, feels all professional). Is there a cheap alternative?
EDIT: I bought a Perc 6/i because screw it :3

I refuse to do a RAID5 with consumer SATA HDDs and only have them in SAS storage. In my research I've seen too many problems unless you use the right HDDs with RAID5, whereas with a RAID10 I've seen far fewer problems reported. Besides, in a RAID5 all HDDs must be read from to repair an array vs a single disk.

Look up Unrecoverable Bit Errors with RAID5 vs RAID10. RAID10 has virtually 0 because of the mirrored disks. You lose half capacity, but I can live with that for more reliability.

This massive topic has much more information than I can give regarding what is right for you.
post #5962 of 6872
Quote:
Originally Posted by Kaishi View Post

Hey all, haven't posted in this thread in a long time. Here's a status update on my Perc 5/i:
I've been running a 7x1TB array in a RAID5 under Server 2008 R2 for about 3 years and I've been quite happy with it. However, at the very beginning of July, the LSI software started reporting unrecoverable read errors on 2 of the disks. I was partially prepared to migrate my data over to a new server (OpenIndiana + ZFS + napp-it), but expedited the process out of necessity. I managed to save all files but one: one bit was flipped in a timestamp, so I just used busybox touch to update it, and the error went away. The other was in a trivial file which I simply deleted. The data has been migrated successfully, so the RAID5 can be decommissioned...
However, my plan is to convert that server into a VM-host. It has already been doing some light VM work, but I'm going to kick it up a notch (and put my systems on an ActiveDirectory Domain for Kerberos authentication). I intend to store my VHDs on the Perc 5/i's array, but I may convert it to a RAID10 or a RAID50 (does the 5/i support 50?)
Should I replace my Perc 5/i with a Perc 6/i? I'm seeing them on ebay for $90 and that sounds reasonable to me. I'm used to native LSI cards now (my OpenIndiana box runs a pair of LSI cards linked to backplanes, feels all professional). Is there a cheap alternative?
EDIT: I bought a Perc 6/i because screw it :3

Which 6/i? I too am looking at getting one but am seeing 2 different models.

WY335 and T774H
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post #5963 of 6872
Quote:
Originally Posted by Reptile View Post

Which 6/i? I too am looking at getting one but am seeing 2 different models.
WY335 and T774H

The only difference I've ever been able to find is which Dell server or workstation the card originally shipped with. Though I'd love to know more.
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post #5964 of 6872
just dont get the Dell SAS 6/IR lol, found out the hard way that one doesnt do RAID5. Im going to get the PERC 6 at some point as id like to have RAID5
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post #5965 of 6872
Quote:
Originally Posted by cyclone3d View Post


I purchased a set of 2 of these off of Ebay:

They are made by Micron. The markings are:

MT9HTF12872PY-667E1 200916 CBNDPD0001
1GB 1RX8 PC2-5300P-555-13-F0
1GB, DDR2, 667, CL5, ECC, REG

I scoured Ebay for quite a while before I found them. I just used the specs off of the Wiki to search for what it said "should be" compatible according to the controller spec sheet.

Any DDR2-400 or higher ECC Registered stick 1GB or below with a configuration of 1rx8 or 1rx16 should work with the PERC 5/i. They also must be single sided.

So these should work:
http://www.zmaxtech.com/mt9htf12872pz-667h1.html (same as I bought)

http://www.ramexperts.com/1gb-ddr2-667-pc2-5300-ecc-registered-1-8v-cl5-240-pin-single-rank-dimm-memory-1rx8.html?utm_source=google&utm_medium=cse


How could you tell if something was one sided? Most ebay listings only show pictures of the front side. Here's one i found and another.



EDIT: Sorry, I only now spotted the followup stating the 5/i still only recognized 512mb. I'll take a look for one of those.
Edited by Leesamn - 7/31/12 at 11:38am
post #5966 of 6872
Quote:
Originally Posted by mcdanielvzw View Post

Quote:
Originally Posted by Kaishi View Post

....
However, my plan is to convert that server into a VM-host. It has already been doing some light VM work, but I'm going to kick it up a notch (and put my systems on an ActiveDirectory Domain for Kerberos authentication). I intend to store my VHDs on the Perc 5/i's array, but I may convert it to a RAID10 or a RAID50 (does the 5/i support 50?)
Should I replace my Perc 5/i with a Perc 6/i? I'm seeing them on ebay for $90 and that sounds reasonable to me. I'm used to native LSI cards now (my OpenIndiana box runs a pair of LSI cards linked to backplanes, feels all professional). Is there a cheap alternative?
EDIT: I bought a Perc 6/i because screw it :3

I refuse to do a RAID5 with consumer SATA HDDs and only have them in SAS storage. In my research I've seen too many problems unless you use the right HDDs with RAID5, whereas with a RAID10 I've seen far fewer problems reported. Besides, in a RAID5 all HDDs must be read from to repair an array vs a single disk.

Look up Unrecoverable Bit Errors with RAID5 vs RAID10. RAID10 has virtually 0 because of the mirrored disks. You lose half capacity, but I can live with that for more reliability.

This massive topic has much more information than I can give regarding what is right for you.
You're describing reasons for the change I've already made: all my storage has been migrated to a ZFS zpool, in the equivalent of a RAID10 config. The thing in question now is an array to hold my VHDs on the VM-Host box. These systems will be backed up to the storage zpool periodically. RAID10 is the better choice not for durability but for IOPS in this case.
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post #5967 of 6872
I bought a new BBU from ebay listed as compatible with Perc 5e and Perc 5i.

This is the listing.

I could not get the cable to connect to my Perc 5i. The socket on the card is larger than the end on the cable. I contacted the seller and they're stating they've sold 5000 of these batteries with no complaints.

Has anyone else gotten a battery like this and gotten it to fit to a Perc 5/i? It's a Cameronsino 7WH listed to replace "PERC5i, U8735, P9110".
post #5968 of 6872
Quote:
Originally Posted by Leesamn View Post

I bought a new BBU from ebay listed as compatible with Perc 5e and Perc 5i.
This is the listing.
I could not get the cable to connect to my Perc 5i. The socket on the card is larger than the end on the cable. I contacted the seller and they're stating they've sold 5000 of these batteries with no complaints.
Has anyone else gotten a battery like this and gotten it to fit to a Perc 5/i? It's a Cameronsino 7WH listed to replace "PERC5i, U8735, P9110".

The PERC 5i uses a different connector than the 5e. You can get them separetely on Ebay also.
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post #5969 of 6872
Thanks!

I've found the proper cable to fit that battery to the 5/i but i'm a bit bothered the seller listed the battery as compatible with the 5/i without including that cable.
post #5970 of 6872
just orderd a perc 5i. i will need to add/change out the heat sinks and order at least another f3 drive to start my raid 5 going.
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