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

Workaround

• See the LeftHand Networks document at this URL:

https://www.lefthandnetworks.com/member_area/

dl_file.php?fid=1037

• Also, see the section entitled “Running automatic start services on iSCSI

disks” in the Microsoft iSCSI Initiator Users Guide for more details.

An iSCSI Volume That Becomes Unavailable For Approximately 60 Seconds

Or Longer May Cause Data Loss (3396, 3298, 573)

Scenario

The Windows Registry has a default maximum hold time setting of 60 seconds

before a Windows system terminates a connection to an iSCSI device that

is unavailable.

This means that an iSCSI volume that becomes unavailable for longer than 60

seconds may cause delayed write failures and potential data loss.

Workaround

Change the Windows Registry settings for the default Maximum Request

Hold Time to 600 (decimal) value.

Important: Back up your registry.

“Refer to the HP document – Best Practices for Enabling Microsoft Windows

with SANIQ”

When Mounting Existing iSCSI Volumes On Different Servers, Volumes May

Be Assigned Duplicate Drive Letters Or No Drive Letters (469, 541)

Scenario

An iSCSI volume that was mounted on a server and assigned a drive letter is

logged off from Server 1. It is then mounted on Server 2. Sometimes, it picks

up a drive letter that is already in use on Server 2. Sometimes, it is not

assigned a drive letter. The volume then becomes inaccessible.