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PERC 5/i RAID Card: Tips and Benchmarks - Page 437

post #4361 of 7194
Quote:
Originally Posted by the_beast View Post
I have an old Pentium heatsink on my PERC - it now takes up 2 slots, but is cool to the touch with just the airflow in my case. Net cost ~10mins, and zero added noise.

Unless you have watercooled everything (VRMs, decent NIC chipsets, TV Tuners, PSU, etc) you must have some airflow in your case, and with a slightly larger heatsink the PERCs are quite happy. There really is no need to go to the expense of a waterblock. The chip is only ~11W TDP!
Never said it was needed. I stated I did it for less noise, because I had the block laying around and that I water cool my stuff.

I posted the pics for folks that wanted to do it and for that I get slammed. The question came up on another forum, so I thought I would post the information since cooling the PERC is one of the subjects on the first page.
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post #4362 of 7194
Hi, I have a Perc 6i card with 3 HDD in Raid 5 (1.8 TBytes) work ok. It is mounted on a motherboard Asus M2N-SLI Deluxe with an AMD Athlon (tm) Dual-Core 7850 Processor, 2 GB of Ram.

The biggest problem I find in this configuration, like many colleagues, is the issue of compatibility of the motherboard with the card, the problem of pin 5 and 6.
This causes that the HDD SMART function does not work, so that any errors that occur in the HDD are not reported by the system, resulting in mounting problem in the server, and other alerts that are no longer reported:
Hdd temperature.
HDD sleep
and many other functions will not be reported .....

It would be possible to modify the 1st post indicating motherboards have no problems recognizing the card perc 5i and perc 6i no problems with the bios, helping all users of this forum (including those with incompatilidades so as not to purchase these plates, or possible solutions with the bios update).

Thanks to the forum. Greetings.

P.D.: Only a suggestion. Sorry for my english...
post #4363 of 7194
Having issues keeping a stable system with a newly acquired Perc 5i and hoping somone here can assist.

First system tested: Intel D946GZIS Desktop Board (One x1, one x16 slot with IGP)
- 5/6 pin mod, system booted ok with/without
- could see drives attached and was able to do a test init on a single 640gb hdd which took about 2hrs.
- booting into win7 resulted in "this device cannot be started"
- i believe the x16 slot on this board is for video cards only

Second system tested: MSI G33M (One x1, one x16 slot with IGP)
- 5/6 pin mod, if not done, system wouldn't POST
- once booted, can see drives attached
- system not stable

Basically the second system does this weird power cycle when the system is rebooted either by software or alt-ctrl-del.

eg
- Cold boot, system seems ok, go into perc config at the end hit ctl-alt-del. Appears to reboot then power is instantly turned off and back on again. This happens again but after maybe a few seconds. Sometimes on the 3rd restart the system will stop at POST with a message about the board being overclocked too far. Not using any O/C so not sure what that is about.

Try a CMOS jumper clear. Cold boot, system states BIOS issues so hit F key for default values and system boots up. Had a Fedora live cd in the drive, boots up. Hit the option for memory test and that runs ok. Do a ctrl-alt-del and back to the restarts.

Card config has the following info:
Pkg 5.1.1-0040
FW 1.03.10-0216
BIOS MT28

Running standard headsink but I have a 12cm fan on the side of the case and another 2 infront of the hdd bays creating good flow across the card. After running the init on the first system, both heatsink and the arm chip were ok to touch.

While waiting to source a 3rd motherboard to test in, has anyone had similar issues or able to suggest any other ideas?
post #4364 of 7194
Just picked up 4 of these bad boys to put on RAID 5 on my second 6/i: HITACHI Deskstar HD32000 IDK/7K (0S00164)...



Saw em at Frys on sale for $118 a piece and decided to pull the trigger. I only have about 100GB remaining on my current RAID 5 array. Didn't ever think i would fill it... but a year and a half later, here I am in search of more high speed redundant storage.

I know they probably wont be as solid/fast as the Caviar Blacks, but I have heard some initial reports on other forums that these Hitachi drives do well in Areca hardware RAID configurations, so hopefully that translates well over to the PERC 5. They are the lesser of the evils when it comes to the 2TB contenders, also... Since the WD EARS drives are so flaky and the Seagates drop out a lot. Supposedly theres a CCTL tool for the Hitachi drives, I will be looking into this and reporting back.

EDIT: I saw a MIR for these suckers making them $99 a piece but good luck cashing in on more than one rebate without multiple addresses... LOL
Edited by DJZeratul - 6/14/10 at 4:08pm
    
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post #4365 of 7194
Okay, I need some help.

Have two RAID 5 arrays setup on my PERC 5. One with 4x1TB drives and one with 4x2TB drives. Just changed out my video card and put in some more ram into my server. So I reboot the computer and when I get into windows neither one of the RAID arrays is showing up.

This has happened once before and I ended up losing all the data on the drives, but that was only because I was impatient. I have not written anything to either array, have not tried to do anything in disk manager or tried to rebuild the arrays at all.

So my question is, what can I do to make sure I get me data back? I don't care how long it takes. Cheers!
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post #4366 of 7194
Have you tried restoring your old video card and pulling out the extra ram ?
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post #4367 of 7194
Quote:
Originally Posted by runnin17 View Post
Okay, I need some help.

Have two RAID 5 arrays setup on my PERC 5. One with 4x1TB drives and one with 4x2TB drives. Just changed out my video card and put in some more ram into my server. So I reboot the computer and when I get into windows neither one of the RAID arrays is showing up.

This has happened once before and I ended up losing all the data on the drives, but that was only because I was impatient. I have not written anything to either array, have not tried to do anything in disk manager or tried to rebuild the arrays at all.

So my question is, what can I do to make sure I get me data back? I don't care how long it takes. Cheers!
Do the drives show up in MegaRAID as physical disks? I'm betting the VD's are showing up as foreign...
    
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post #4368 of 7194
Hi

I recently bought a perc 5/i and im having issues with it under freebsd.
My setup:

4x8218 opteron
16g ram
Arima motherboard
Dell perc 5/i with latest firmware and bbu
4x1.5tb Samsung 5400rpm

I set the card to write back and adaptive read-ahead but im not getting near the desired speeds. 50-65MB/s writes and 60-80MB/s reads with raid5 are pretty low in my opinion.
Does anybody have some ideas how to get more speed out of it?
post #4369 of 7194
Quote:
Originally Posted by zsozso View Post
Hi

I recently bought a perc 5/i and im having issues with it under freebsd.
My setup:

4x8218 opteron
16g ram
Arima motherboard
Dell perc 5/i with latest firmware and bbu
4x1.5tb Samsung 5400rpm

I set the card to write back and adaptive read-ahead but im not getting near the desired speeds. 50-65MB/s writes and 60-80MB/s reads with raid5 are pretty low in my opinion.
Does anybody have some ideas how to get more speed out of it?
I don't know that much about FreeBSD, but I use Linux with the PERC 5/I. In the Linux world at least, the Linux block device read-ahead conflicted with the controller's read-ahead. I ended up disabling the read-ahead in the controller, and cranked up the read-ahead buffer in Linux block device driver to something like 8Mbytes or 16Mbytes. This improved my sequential read performance from 150MB/sec to about 400+ MB/sec. My setup uses 8x 7200RPM drives though... I don't know the performance of the samsung 5400 rpm drives... I don't know if there is something equivalent in FreeBSD to this, but might be worth looking into..
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post #4370 of 7194
Quote:
Originally Posted by BLinux View Post
I don't know that much about FreeBSD, but I use Linux with the PERC 5/I. In the Linux world at least, the Linux block device read-ahead conflicted with the controller's read-ahead. I ended up disabling the read-ahead in the controller, and cranked up the read-ahead buffer in Linux block device driver to something like 8Mbytes or 16Mbytes. This improved my sequential read performance from 150MB/sec to about 400+ MB/sec. My setup uses 8x 7200RPM drives though... I don't know the performance of the samsung 5400 rpm drives... I don't know if there is something equivalent in FreeBSD to this, but might be worth looking into..
I already tried disabling the read ahead but its not changing anything.
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