Re: [Networker] disaster recovery
2006-05-30 04:15:07
Terry,
The thing you're looking for is forcing both Legato AND windows to use a
different block size. The problem here is that a lot of Host Bus Adapter
drivers (SCSI/FC) are not configured to allow a large blocksize and as
such default to a maximum of the well known Windows 64k.
You can add a registry key to the HBA driver to allow for bigger
blocksizes:
HKLM\SYSTEM\CurrentControlSet\Services\<scsidriver>\parameters\device; add
DWord MaximumSGList=FF)
Use the following command to check whether your maximum blocksize is
limited to a lower (=<64k) value:
mt -f \\.\Tape0 status
So if you set MaximumSGList to FF, Legato Networker can then successfully
write bigger blocks to the tape device when instructed to via the
NSR_DEV_BLOCK_SIZE_<media type> environment variable.
A windows setting to default all windows operations to write at bigger
blocksizes is unknown to me.
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