On Sat, 6 Sep 2003 03:06:27 GMT, (Keith Michaels)
wrote:

Can a single fibrechannel HBA be shared between disk and tape?
This is for a Windows 2000 fileserver that has an HBA for SAN disk
but will now run backup and/or HSM to fibrechannel drives that
are also SAN-attached. If the HBA can be shared can it support
simultaneous access to more than one tape drive? Backup/HSM
software is not decided yet, Veritas, Tivoli, or ???

Yes, you can share the HBA with disk and tape but it is not recommended.
Disk does random read/rights while tape does streaming reads/writes. If
your server gets high I/O like in a production invironment, your backups
will eventually have problems. The disk traffic will interrupt the
backup traffic and will either cause shoe-shining and eventual backup
failures. Also, if you ever want to do server-less backups, you must
have a second HBA.