Re: LAN Free Backup TSM/SAN/ESS

From: Jonathan Fosburgh (syjef_at_mdanderson.org)
Date: 07/29/03 

Date: Tue, 29 Jul 2003 06:58:14 -0500

Nenad wrote:

>>
>> Option 1. – Oracle DB server is SAN zoned such that it can access both
>> the ESS disks & LTO tape library using the same fibre channel cards. TSM
>> server pretty much just controls & monitors the process, doesn’t cache
>> the data in storage pools or anything.
>>
>> My understanding is that having disk & tape on the same fibre channels
>> isn’t a good idea but as I’m a SAN novice I’ll take any advice
>> gratefully.
>
> It is recomended to have disks and tapes on separate FC adapter.
It is recommended but I have never seen more than anecdotal evidense to
support that claim. This is a similar setup to what we use. Not everything
we have on our SAN is current using LAN-free backup, but some systems are
and others are moving towards it. All of our RISC systems (and all of the
Intel) on the SAN have dual HBAs (using SDD for the disk) with access to
disk and tape, and we do not experience any problems. Incidentally, the
wording I have read on the disclaimer about disk and tape sharing an HBA
seems to indicate only that it may be a problem in a single HBA
environment, not when multiple HBAs are being used and there is
load-balancing, etc. HTH.

Relevant Pages

  • Re: Resilient VMS server config
    ... > not require huge amounts of disk space. ... > volumes provided by the SAN. ... There is NO loss of availablity** Do online backups of your database to a backup ... Maintenance stuff - like doing the actual backup to tape... ...
    (comp.os.vms)
  • Ghost Drive Letters on 6 node Exchagne cluster
    ... test both QLogic 2300 HBAs with an IBM FasT SAN, and Emulex 9802 HBAs with a ... EMC Symmetric SAN. ... regarding failover, when a disk resource is failed from node 1 to node 2, in ...
    (microsoft.public.windows.server.clustering)
  • Re: Booting from SAN or local?
    ... STORPORT) drivers for your HBAs and ensure they're configured properly ... >>> the SAN is really slow. ... >> performance from your data volumes is adequate but the boot disk is poor ... >> from DAS (depending on the configuration of your SAN of course) and ...
    (microsoft.public.windows.server.clustering)
  • Re: SAN support for Iseries and How-to
    ... SAN means network. ... Note that a direct connection from these IOA to disk or tape is ...
    (comp.sys.ibm.as400.misc)
  • Re: SAN disks, tape and FC Adapters
    ... In our environment we used at the beginning two FC for SAN and used ... both FC adapters also for tape access. ... only one adapter the error rate went down and after using a dedicated ... Section:4.1.3 Tape and disk on the same HBA ...
    (comp.unix.aix)