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PERC 5/i RAID Card: Tips and Benchmarks - Page 565

post #5641 of 7269
I'm pretty sure the PERC 5i has a 2TB drive limit. e.g. if you use a 3TB drive it will only show up a 2TB.

I don't think there will ever be a firmware fix for this, especially with the age of these PERC 5i's.
post #5642 of 7269
Ok thanks, thats a pity. Can anyone confirm the latest megaraid drivers dont support large physical disks?

Cheers
    
CPUMotherboardRAMHard Drive
Q8400 2.66Ghz LP Asus P5QVM 12Gb DDR2 4x WD Caviar Green, 2x Segate 1.5TB, 2x WD 2.5TB 
OSPower
VMware ESXi 5 750W 
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CPUMotherboardRAMHard Drive
Q8400 2.66Ghz LP Asus P5QVM 12Gb DDR2 4x WD Caviar Green, 2x Segate 1.5TB, 2x WD 2.5TB 
OSPower
VMware ESXi 5 750W 
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post #5643 of 7269
ok far too long to read and none of my searches were coming up with a decent answer to my question.

The perc 5/i has ECC registered memory and needs to be running in either x8 or x16, meaning 4 or 8 memory IC's.

Does this mean I can use a 1gb stick if the chip numbers are the same? like THIS one?
post #5644 of 7269
Quote:
Originally Posted by Pyroball;14846362 
ok far too long to read and none of my searches were coming up with a decent answer to my question.
http://www.google.com/cse?cx=partner-pub-0500457209104480%3Aw4uakiy7wkk&ie=ISO-8859-1&q=perc+1gb&sa=Search&siteurl=www.overclock.net%2Fraid-controllers-software%2F359025-perc-5-i-raid-card-tips-564.html
Quote:
The perc 5/i has ECC registered memory and needs to be running in either x8 or x16, meaning 4 or 8 memory IC's.
Because it's ECC - it would be 5 or 9 chips wink.gif Extra chip for parity.
Quote:
Does this mean I can use a 1gb stick if the chip numbers are the same? like THIS one?
But PERC 5/i won't see/use more than 512MB - if it boots ...
post #5645 of 7269
Quote:
Originally Posted by RobiNet;14847118 
http://www.google.com/cse?cx=partner-pub-0500457209104480%3Aw4uakiy7wkk&ie=ISO-8859-1&q=perc+1gb&sa=Search&siteurl=www.overclock.net%2Fraid-controllers-software%2F359025-perc-5-i-raid-card-tips-564.html

Because it's ECC - it would be 5 or 9 chips wink.gif Extra chip for parity.

But PERC 5/i won't see/use more than 512MB - if it boots ...


tongue.gif preamble there was saying that is what i DO understand and know. Anyoo, answer is no? 512mb is max?
post #5646 of 7269
Quote:
Originally Posted by Pyroball;14848893 
tongue.gif preamble there was saying that is what i DO understand and know. Anyoo, answer is no? 512mb is max?

Then why do you ask the question ? tongue.gif
post #5647 of 7269
Newb here, have a problem with a dell poweredge server w/ perc5i card. The drives are SLOW!

The server has 6x seagate SAS 15k 75gb ST373455SS drives. It has two logical drives: one is a raid5 using 4 drives, the other logical is a single disc. The 6th HD is set as hot spare for the raid5 array. Cache is set to adapt read ahead and write back. Battery shows good (as does everything else) in the dell openmanage console.

Its running win server 2003 R2, with the latest drives and firmware available from dell's website.

Testing with crystaldiskmark shows that sequential read speed is 13MB/s. Ive tried reflashing the firmware and reinstalling the drivers several times to no luck. Rarely, after rebooting, it will show ~250MB/s, but it will go back to under 20MB/s after being on for just a few hours.

I've tried 'shifting' the raid5 array one HD at a time. (i.e. starting with raid5 using drives 1,2,3,4, set drive 4 offline, rebuild array using drives 1,2,3,6, then retest, repeat until drive 1 is the unused hot spare) The results are the same so don't think it's a physical drive issue.

Running out of ideas here, anybody experienced something similar?
post #5648 of 7269
Have to actually let the the RAID5 array finish initialising?

It can take some time for the initialising to finish. On my 4 x 2TB RAID5 array it takes over 8 hours to finish initialising. Install the megaraid software and check for any tasks running in the background, you should be able to see any background tasks in the PERC's bios as well.
post #5649 of 7269
yes of course, the array is small so it takes like 30 min until it rebuilds with the new drive. Like I said, even before I tested swapping drives, the performance was/remains terrible. Of course its even worse while running degraded (9MB/s sequential read )

Interesting to see if it will let you set an extra drive offline while rebuilding, data loss for sure.
post #5650 of 7269
Have your tried benching the disks individually?
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