HP LeftHand SAN Solutions Support Document - Service Notes - VSA 7.0 for VMware ESX

Workaround

Increase the minimum rebuild rate to a value of 10 or greater. The following

guidelines describe the effects of the RAID rebuild rates.

• Setting the rate high is good for rebuilding RAID quickly and protecting

data; however, it will slow down user access.

• Setting the rate low maintains user access to data during the rebuild.

Removing Drive From Storage Module Without First Removing Disk From

RAID Requires Rebooting The Storage Module To Recover From Degraded

Mode [NSM 150] (707)

See the section, Managing Disks, in the LeftHand SAN User Manual or the

online help, for instructions about removing and replacing drives.

Scenario

If you remove a drive without first removing it from RAID in the Console,

RAID becomes degraded and the storage module becomes inaccessible.

Workaround

1 Re-insert the drive.

2 Reboot the module.

3 Add the disk to RAID. RAID will start rebuilding after the drive is

powered on.

No Warning If You Remove and Re-Add Disk To RAID 0 [NSM 150, NSM

200] (2302)

Scenario

Storage module is configured with RAID 0. While the storage module is

running, you manually remove any disk from the storage module. On the Disk

Setup window, the disk status is “Off or missing.” On the RAID Setup window,

RAID status is Normal.

This scenario occurs when the disk is removed while there is no activity to the

volume. As soon as any activity to that volume occurs, such as a client

attempting to read or write data, then the volume becomes unavailable.