v1.6.0 - HP StorageWorks NAS 8000 - Release Notes

- From the Command Line Interface

Error message:

com.hp.HpPanDev.SanDevice.DeviceException: Non Responding Device: c9b0t0l0 -

Unknown SCSI status

at com.hp.HpPanDev.Array2001Obj.CBridge.scsiErrorCheck(

CBridge.java: 8674)

Solution:

From the Command Line Interface, execute the following command:

% scanStorageHbaScsi

These corrective actions will only work if an alternate management path is available for use

(usually through another HBA). The Data Path Manager product will still automatically switch to

alternate paths to serve data even if a management path is down.

LUN path maximum

• Important: There is a 128 logical path limit on the NAS 8000. If you exceed this limit the server

will only detect the first 128 logical paths and disregard any others. Since it is impossible to

predict which 128 logical paths will be seen, this can change between reboots of the system.

Exceeding the 128 logical path limit may cause unpredictable and undesired effects with your

storage. SAN managers should observe care in how LUNs are presented to the NAS 8000 by

using appropriate zoning techniques.

• A logical path is a physical fibre-channel path from an HBA on the NAS 8000 through zero or

more switches to a port on a controller on a storage array that is presenting the LUN to the HBA.

There are typically 2 logical paths to each LUN on a dedicated attach system that does not use

switches, and 4 logical paths to each LUN on SAN attached systems or dedicated attach systems

using switches.

• Use the following formula to calculate the total number of logical paths: For each LUN: Paths =

(Number of HBA's to which this LUN is presented) * (Number of ports on which this LUN is

presented).

• You can reduce the number of paths by removing LUNs, zoning out ports, or removing cables to

unneeded ports.

• The VA arrays always present LUN 0 for management purposes, even if this LUN has not been

created.

This information is subject to change without notice and

is provided "as is" with no warranty.

Hewlett-Packard shall not be liable for any direct,

indirect, special, incidental or consequential damages

in connection with the use of this material

HP StorageWorks NAS 8000

Version 1.6.0 Release Notes 10