Dell Microsoft Windows Unified Data Storage Server 2003 (PowerVault NX 1950) Betriebsanweisung PDF herunterladen (Seite 10)

Upgrade Issues

Table1-5 provides a list of issues you may encounter during an upgrade and the possible workaround or solution.

Table 1-5.UpgradeIssues

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

fails.

management or Diskpart utility.

In Gateway solutions, the

Storage Manager for SANs

console displays incorrect LUN

size when LUN is greater than

2 TB.

AnyLUNthatisgreaterthan2TBisreportedas2TBintheStorage

Manager for SANs console

This is a known issue.

In the Gateway solution,

extension to maximum LUN size

grows.

The reported initial maximum size can be extended based on the

requirement of the RAID group it is a part of. The reported maximum size

for LUN extension increases after the extension operation on the storage

array because of the one or both of the following factors:

l The API allocates a safe buffer zone during the estimation of the

maximum size of the RAID group, due to the required 5—7%

overhead of the RAID group.

l A new RAID group with additional disks may have been created.

Verify the maximum allowed LUN size through

Navisphere Manager

In Gateway solutions, actual

LUN extension Size is smaller

than the requested size.

After a successful LUN creation, the reported LUN size is smaller than the

requested LUN size from the Share and Storage Management wizard.

The API allocates a safe buffer zone during the estimation of the maximum

LUN size. The maximum LUN size also depends on the RAID type. The

overhead is approximately 5—7% of the LUN size. For example, in a LUN of

size100GB,2TBisallocatedtooverhead.

Verify maximum allowed LUN size through

Navisphere Manager.



Issue



Description



Workaround/Solution

If Firewall is enabled during

upgrade, it may cause issues.

If the Windows firewall is enabled during upgrade from

Windows Unified Data Storage Server 2003 Standard Edition

to Windows Unified Data Storage Server 2003 Enterprise

Edition, the Microsoft iSCSI Software Target console fails.

Disable the firewall before starting the upgrade.

Importing Virtual Disks.

If you do not unassign the LUNs from a system correctly

before redeploying an operating system, the pre-existing

LUNs may be unavailable in the new operating system due

to SCSI reservation.

You must clear the SCSI reservation on the virtual disks

manually.



NOTE: For more information about the commands required

to clear SCSI reservation on virtual disks, see the

DellPowerVaultMD3000StorageManagerCLIGuide.

iSCSI Software Target console

crashes if a node has iSCSI

virtual disks assigned to it

before joining the cluster.

If you create iSCSI virtual disks or targets before the node

joins the cluster, the iSCSI Software Target snap-in

crashes.

Perform the following steps:

1. Stop the Microsoft iSCSI Target Service and then

close the PowerVault NX1950 Management

Console.

2. Launch cluadmin.exe® Groups® Cluster Group.

3. Right-click the Cluster Group and select New

Resource.

4. In the New Resource window, enter WinTarget as

the Service, and select resource type as Generic

Resource.

5. In the Dependencies window, add cluster IP address

and cluster name of your current single node cluster.

6. Add the registry key: SOFTWARE\Microsoft\iSCSI

Target.

7. Select the WinTarget resource and bring it online.

8. Disable the firewall and delete the cache file located

at%APPDATA%\Microsoft\MMC\nas2.

9. Start the Microsoft iSCSI Software Target Service.

10. Launch the PowerVault NX1950 Management

Console.

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