04-11-2011 12:13 PM
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04-11-2011 07:34 PM
Coming to EVA4400, there were some firmware related issues (for earlier releases of this EVA Model), which were marking the disk drives bad, though they were good. This has been corrected in later. Current firmware is XCS09534000 which is quite stable. If you have observed frequenty disk failures, even with this firmware , you should log a call with HP to find out if there is some thing wrong.
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04-12-2011 12:22 AM
We replace dozens of disks on EVAs every day, they are mechanical disks, are expected to fail, that's why RAID 5 or 1 is used.
Have you at least updated controllers to XCS 09534000 and disks to latest firmware?
04-12-2011 05:15 AM
Regarding firmware, I keep up on the Controller Firmware.
The drives are a different story. Disk Firmware Versions range from HP01, HP04 and HP06
04-13-2011 08:09 PM
So based on this you should have only lost about 1 disk in this time frame.
Please note that electronic componnets have a typical bathtub failure profile. There is a higher failure rate called infant mortality. This happens in the first x months of the devices life.
Once this infant mortality phase is over the devices should settle down into the low failure rate indicated by the MTBF. After about 5 years the electronics will start to wear out and you will start seeing a high failure rate.
One thing that can dramatically effect failure rates or reduce the life of disks is the tempurature that they operate at. Depending of the operating tempurature one disk manufacture said that the disk drive lifetime could be reduced from 5 years to 3.
While this doesn't answer your question directly. I hope it gives you a feel for what to expect.
Also you need to be running the latest version of the EVA 4400 firmware. Older versions may have marked disks as bad when they were in fact good.
04-13-2011 08:56 PM
Here is the list of the current versions:
For BF146DA47C latest is HP07.
Hope this helps!
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04-15-2011 04:45 AM