What hardware are you using? You may be running into this bug: CSCsl04537
More info in the link, but this is the gist of it:
Problem Description
Certain Firmware versions on the 72GB and 146GB 10K SAS Hard Drives that can reside in MCS-7835-H2 and MCS-7845-H2 servers can become inaccessible during normal operation.
Hard Drives on other servers are not affected.
The affected firmware versions are:
HPD2
HPD4
HPD5
HPD7
Please see the How to Identify Hardware Levels section for instructions on how to determine the Hard Drive Firmware Version.
Background
Details of this issue are available in HP Firmware Advisory, c01186030
Note: Please do not use the Solution provided in the above link to upgrade firmware. Please follow the directions in the Workaround/Solution section of this notice.
The HP Model numbers for affected drives used in the MCS Servers are:
DG146ABAB4
DG072ABAB3
The affected Firmware versions are:
HPD2
HPD4
HPD5
HPD7
See the How to Identify Hardware Levels section for instructions on how to determine the Hard Drive Firmware Version.
Replacement of a failed drive with this problem is not necessary and should not be requested. This situation is recoverable in the field as highlighted in the Workaround/Solution section.
Problem Symptoms
A hard drive with one of the affected firmware versions in an MCS-7835-H2 or MCS-7845-H2 may suddenly stop functioning. This behavior is documented in the HP Firmware Advisory, noted in the Background section.
Workaround/Solution
The workaround to this problem is to shut down and power off the server. The drive will regain functionality after powering up. The problem may return after an unknown period of time.
The permanent solution to this problem is to upgrade the Hard Drive firmware. Hard Drive Firmware can only be updated while a drive is running in a server; any SPARE drives that have the affected firmware must be installed in a server in order to be upgraded. Physical access to the server is required to implement this solution.
To Upgrade the Hard Drive Firmware:
1. Go to Unified Communications Manager & Voice Apps Crypto Software (registered customers only)
2. Download 2 files:
-FWUCD-1.1.1.iso
-FWUCD-1.1.1-Readme.txt
3. Burn the FWUCD-1.1.1.iso image onto a CD or DVD
4. Review the contents of the Readme.txt
5. Insert the CD/DVD and then reboot the server
6. Install the Firmware update (see readme.txt for more detail)
7. DO NOT ABORT the installation of firmware updates while they are in progress. If installation is aborted, unpredictable results may occur!
8. After the installation of the firmware updates, power cycle the server and allow it to reboot.
