HP StorageWorks 12000 - Virtual Library System EVA Gateway Manual page 205

• Windows device configuration: The following guidelines apply to Networker on Windows:
• Disable Plug and Play Test Unit Ready (TUR) for any tape drivers in use. A SCSI TUR command
may rewind a mounted NetWorker tape unexpectedly, causing data loss.
• Enable "verify header on eject" in the NetWorker autochanger. This marks any tapes corrupted
by a SCSI TUR reset/rewind as suspect.
• For versions of NetWorker newer than 7.4.1, use Windows Tape Drive Persistence to ensure
that tape device names do not change when Windows is rebooted. This will enable device
paths other than the standard \\.\Tape0 to be used, such as \\.\Tape2147483646 or \
\.\tape4801101. For Windows Tape Drive Persistence, see
kb/873337.
• Confirm that the Fibre Channel device supports a maximum block size larger than that being
used in NetWorker. This can most easily be done in Windows via the NetWorker mt command.
If the maximum supported block size found via the mt command is too small (typically 64 or
96 KB), contact the Fibre Channel HBA Vendor for assistance in modifying the SCSI Scat-
ter/Gather registry setting in the Windows Registry for the Fibre Channel HBA. The following
is an example mt command:
C:\>mt -f \\.\Tape4801110 status
\\.\Tape4801110:
Media Capacity = 292.97GByte
Media Remaining = 289.95GByte
Media Blocksize = 0
Media Partition Count = 1
Media is not write protected
default blocksize = 65536
maximum blocksize = 524288
• Linux device configuration: The following guidelines apply to Networker on Linux:
• Configure stinit.def to enable variable block size. This requires the st-mt package to
be installed and /etc/stinit.def to be configured. See the Linux man page for configur-
ation details and examples. HP recommend setting stinit to load via an init file (for example,
/etc/rc.local on Redhat) to ensure it is loaded properly.
• NetWorker supports Linux udef device naming. See the EMC whitepaper Persistent Binding
and udef Changes for EMC NetWorker for details (document h5795, available at
powerlink.emc.com).
• UNIX device configuration: The following guidelines apply to Networker on UNIX:
• AIX – Ensure that variable block mode is enabled. AIX does not have a persistent naming option,
although the ODM database generally tracks device links properly across reboots.
• Solaris – Ensure that the tape drive is supported in the kernel. This is most easily done by running
strings /kernel/drv/sparcv9/st |grep
the tape drive string found in /var/adm/ messages. If tape drive is unsupported by the kernel,
configure st.conf to allow variable block mode. For Solaris Persistent Naming, see Section
8, Persistent Binding for Tape Devices available at http://docs.sun.com/source/819-0139/.
• HPUX – An issue exists when EMC NetWorker uses tape library SCSI commands via activation
of a Common Device Interface (CDI) with the HPUX 11.31. Operating CDI is activated by
default in EMC NetWorker. When CDI is activated, HPUX estape driver has a problem dis-
tinguishing between EOT and BOT, thus causing job failures. The EMC messages log may
contain the following as symptom:
--------------------------------------------------------------------------------
Oct 22 13:30:29 nairobi: NetWorker media: (warning)
rd=suzanne.ebs.net:/dev/rmt/c8t2d0BESTnb writing: continuation, No space left on
device, at file 2 record 0Oct 22 13:30:29 nairobi: NetWorker media: (emergency)
i LTO (for LTO) and comparing this to
HP StorageWorks VLS and D2D Solutions Guide
http://support.microsoft.com/
https://
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