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PERC 5/i RAID Card: Tips and Benchmarks - Page 435

post #4341 of 7150
Just got the 2.35 installed, but still no chance at all...
sigh
post #4342 of 7150
Started setting up my file server today and among the many other problems i am having when going into the Perc 5i's bios only 2 of the 5 drives are showing up. In the past I've run 4 and 5 drives with the card before(although different drives). Possible that I've got 3 DOA's on the drives?
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Roger Rabbit
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post #4343 of 7150
try them on different ports or directly attached to onboard ports?
post #4344 of 7150
Few quick questions.

What pins/jumpers do I use for the activity led.

There is a pair just under the dim module and a group of 4 under the processor.

Also running windows7 x64. What management software can I use. Links?
post #4345 of 7150
Getting some errors.
I am running a setup consisting of
Asus M4A785D-M-Pro motherboard
AMD X4 630 Processor
(Gig) 2 x 1gig ddr2 + 2 x 2gig ddr2
Perc 5i Controller driving
4 x WD Green 1gig disks.

System has been running now for 24 hours and have had a few raid failures. Running raid 5 and getting the errors
PD Removed 0:0
Device Removed Device Type: Disk Device Id: 0:0
PD Inserted 0:0
Device Inserted Device Type: Disk Device Id: 0:0
Drive is not certified: 0:0

This has happened about 5+ times now and always with drive 0:0
Drive Details
0:0 WDC-WD10EACS-00D
0:1 WDC-WD10EARS-00Y
0:2 WDC-WD10EADS-00L
0:3 WDC-WD10EADS-00L
Since it is only the oldest drive 0:0 that is failing is it simpler to just replace this drive? It has no errors. Smart all okay.

Also, Still looking for jumper desc for the 2 sets of jumpers. Trying top get an activity led wired up.

Also with this raid set I am only getting around 120meg/sec reads. What am I missing with raid5?
post #4346 of 7150
Quote:
Originally Posted by dusty_nz View Post
This has happened about 5+ times now and always with drive 0:0

Since it is only the oldest drive 0:0 that is failing is it simpler to just replace this drive? It has no errors. Smart all okay.
First thing I would do would be check all your cables.

Quote:
Originally Posted by dusty_nz View Post
Also with this raid set I am only getting around 120meg/sec reads. What am I missing with raid5?
Your array is probably continually dedgraded (either with a failed disk or while rebuilding) because of your issue above.

Also are you running with a battery? If not you will be in write-through, and the performance is much lower.
post #4347 of 7150
The issue relates to this I believe

http://en.wikipedia.org/wiki/Time-Li...Error_Recovery

When I benched the raid this morning the array was fine and competed optimal.

I am now re-migrating over 2TB back onto it.

I noticed on the front page a few bench marks. The first is what I got and the second is what I would love to get. Both raid 5 but 3x perf diff. I can't see why?

Yes. Running BBU. Charged and all okay
Edited by dusty_nz - 5/25/10 at 12:01am
post #4348 of 7150
What is an ideal config when creating the raid 5 array of 4 1 tb disks

I used
Adaptive read ahead
Write back
64kb cache

Also changed to
Cached I/O
Access policy REad WRite
Disk cache policy enabled
Edited by dusty_nz - 5/25/10 at 1:32am
post #4349 of 7150
64kb cache? Do you mean stripe?

Ideal is not really a word you can use on its own. What do you want to use the array for? If it's for your OS, then firstly you want to drop RAID5 - instead look at a combination of RAID0 for OS & RAID5 for storage on the same drives, or RAID10. Even running the drives separately may be better than a single array depending on your usage pattern.

If you intend to use the array for storage, then you should (probably) be using a larger stripe size. Go for the largest the PERC 5 offers for best sequential results (although again the optimal setting will depend on the files you are storing and the usage patterns...).

If there was a 'one best setting' then the manufacturers wouldn't bother will all the options, and would just set those as defaults...
post #4350 of 7150
Yeah, 64k stripe.

Used for storage. Replacing my NAS for generic stuff but also VM's from an esx server. Hopefully plan to run VM's across the network.
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