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PERC 5/i RAID Card: Tips and Benchmarks - Page 640

post #6391 of 7150
Quote:
Originally Posted by kithylin View Post

I'm sorry to be the bearer of bad news, but In general you're never supposed to use green drives for any kind of RAID. Not just because of lack of TLER but also because "Green" drives are typically variable RPM and lead to raid system instability.

ya thats what ive heard ive also heard people have had them working just fine in raid 5 ( i was hoping i would be the latter lol) I may end up moving to Flex raid instead and run raid 1 or 10 on some 1tb drives for my more important data hopefully flex raid works on Server 2012
post #6392 of 7150
Quote:
Originally Posted by kithylin View Post

Quote:
Originally Posted by racer86 View Post

well after some research im thinking that it may be because of the WD Green drives im using I found the WD TLER utility so i can adjust that and see if it helps at all going to try setting all the drives to 7s

I'm sorry to be the bearer of bad news, but In general you're never supposed to use green drives for any kind of RAID. Not just because of lack of TLER but also because "Green" drives are typically variable RPM and lead to raid system instability.

 

Not great in RAID, but not variable RPM.  Ever.  ALL drives currently available run at 1, fixed speed.  The variable speed is/was clever (some would say misleading) marketing by WD to try and avoid marketing their Green drives as 5400 rpm drives so as to avoid people assuming they were lower performing drives.

post #6393 of 7150
Quote:
Originally Posted by kyle5281 View Post

Don't let your computer sleep and see if it happens. If it continues, do the retag. Normally when it shows up as RAW Partition in Disk Management, its corrupted RAID Metadata as I mentioned.

Hey Kyle,
This corruption did not go away, despite lowered in frequency in the last couple of days.
I gathered a few disks to back up all my critical data before trying to do any action that can lead to data loss.
Now I am contemplating if I should:
1. Try your re-tag trick and hope that it solves the issue without me needing to copy whole the data back and forth.
2. Just wipe the entire array and create it from scratch, init, format and then restore all the data (which will take a while...) to the new array.

I am thinking that if solution #1 won't work I will probably have to go with solution #2 anyway so might as well just do it in 1st place...
post #6394 of 7150
Quote:
Originally Posted by the_beast View Post

Not great in RAID, but not variable RPM.  Ever.  ALL drives currently available run at 1, fixed speed.  The variable speed is/was clever (some would say misleading) marketing by WD to try and avoid marketing their Green drives as 5400 rpm drives so as to avoid people assuming they were lower performing drives.

Ah... I do remember looking at some "Green" WD drives a few months ago and they actually said on the product page on newegg that the RPM was "4200 - 5400" and said variable RPM, so.. I had just assumed all "Green" drives were that way. Thanks for the correction, then.
post #6395 of 7150
Make sure you back up everything that matters. Solution 1 Works 80-90% of the time. The only time a retag doesn't help is when you have a punctured stripe, which you don't. And regarding the WD Green drives, im using 6 of em and have not had any problems what so ever despite their lack of TLER. It takes a couple of minutes to retag vs a couple of hours/days to restore all of your data.
post #6396 of 7150
I managed to re-tag the array successfully after backing up all the critical data. smile.gif
So far BGI is @ 70%, should be over in about 1.5 hours.

Now I need to wait and see that the partition doesn't get corrupted again.

10x for all the help kyle thumb.gif
Edited by The-Fox - 2/28/13 at 12:52pm
post #6397 of 7150
Quote:
Originally Posted by kithylin View Post

Nice find! Thanks.. this is what I was looking for and I'll use this in the next few days. smile.gif

Now that my array is expanded and all is well, I'm looking to upgrade the firmware on it.

The current firmware upon boot is 6.2.1 I think (dell says current is 6.3.1) however in LSI MegaRAID Manager, it's telling me the firmware is 1.12 or something...

Any ideas how to proceed from here?
post #6398 of 7150
This can be a bit of confusing, but there are 2 version numbers:
1. The Package firmware version, which yours is 6.2.1, the latest is 6.3.1-0003
2. The Controller firmware version, which yours is 1.12, the latest is 1.22.32-xxxx

They correspond to each other as they are both changed when you flash a new/older FW.

The latest Perc 6/i FW is what dell calls A14, get it from the link below:
http://www.dell.com/support/drivers/us/en/04/DriverDetails/Product/poweredge-r710?driverId=W83M2&osCode=WNET&fileId=3008799784&languageCode=en

Throw it's content on a Bootable USB stick, reboot and flash.

Choosing the right FW is a little tricky, as Perc 6/E, Perc 6/i Integrated and Perc 6/i Adapter all have different FW and will not update each other (so there is no risk if you make a mistake).
The link above is for the Dell Perc 6/i Integrated.
post #6399 of 7150
So for those just finding this thread, I've been carefully selecting some parts via ebay and I figure I'll put information all in one post for folks.

I bought one of these recently and mine just arrived today. I stuck it in my AMD dual-socket 940 motherboard, it's running without a problem, BBU is low capacity but enough for the 256mb module. So I'm sharing here in case anyone wants one, One left.

Dell PERC 5/i (Dual SFF-8484 ports), with 256mb cache module, full height PC bracket, and BBU battery, $34.99 with free shipping.

http://www.ebay.com/itm/111013439887

Also for cooling, I've bought one of these for the PERC 5/i in my I7 computer, and it's all these little PERC cards need, at least in a normally decently ventilated desktop case (I'm using an Antec 1200 with "Antec Tri-Cool" 120mm fans throughout.)

40mm fan, with 3 leads, connects to motherboard 3-pin fan leads, and gives you RPM's so you can monitor your PERC's fan via software (I use AIDA64, which you can program it to email you alerts if the fan's rpm drops below whatever RPM you set it to, great for a stand-alone headless server machine)

Anyway, $5.99 with free shipping, it's an exact perfect fit for the factory heatsink on the PERC 5/i, you just need to come up with your own two screws to fit in it. Most computer technicians have a tub with all sorts of screws in em though.

http://www.ebay.com/itm/270975559964


If you need cables for SATA drives, I've found these are cheap ($18.08 each, free shipping).

TRIPP LITE SFF-8484-to-4-SATA cable, to connect SATA hard drives to the PERC 5/i card.
A Perc 5/i needs 2 of these to connect all 8 drives to it.

http://www.ebay.com/itm/330870706673

The fan and cable should work with the PERC 6 too, I think.

Total with perc 5 + fan + 2 cables would be $77.14 Compare that to other 8-port-capable hardware raid5 SAS PCI-Express cards.
Edited by kithylin - 3/1/13 at 4:08pm
post #6400 of 7150
Quote:
Originally Posted by kithylin View Post

Also for cooling, I've bought one of these for the PERC 5/i in my I7 computer, and it's all these little PERC cards need, at least in a normally decently ventilated desktop case

Thanx, repya. Most 40mm would fit I would think, but nice to have a convenient eBay hyperlink.
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