Thanks Charles for responding

The majority of the restore time is spent in formatting the DB and logs.
They are actually restoring from a fileclass backup of the TSM DB. I know
when they told me these times I found them hard to believe as well.


On 04/02/2008, Hart, Charles A <charles_hart AT uhc DOT com> wrote:
>
> I think the first question id 45GB restored in 5Hours, that's 5 GB hour
> / 1.3MBS Second... What kind of Tape Drive are you using, is it on its
> own HBA (Don't Mix Disk / Tape I/O down same path)
>
> Sounds like you have an I/O challenge.  As far as the Idea below, never
> tried, but take in consideration that if the TSM DR box is in a
> different geographical location you'll have to use FCIP or Disk Frame
> replication to gain access to those volumes.
>
> -----Original Message-----
> From: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU] On Behalf 
> Of
> Neil Sharp
> Sent: Monday, February 04, 2008 10:28 AM
> To: ADSM-L AT VM.MARIST DOT EDU
> Subject: [ADSM-L] TSM DR restore query
>
> Hello I was wondering if anybody could help or advise with the following
> question.
>
> I need to devise a solution to speed up DR for one of my customers.
> Currently their DR solution is the classic restore from TSM DB tape and
> then load all of the off site tapes into the DR library and then perform
> the client restores. The problem is that the TSM DB restore can take in
> the region of 5 hours. The TSM DB is 45GB.
>
> I was thinking of using the following method. Can any one see any issues
> with this?
>
> *On the primary TSM server:*
>
> They have a Windows 2003 Standard Edition TSM server. I am proposing
> that we set up TSM DB and log mirroring, one copy on local disk and the
> second copy on SAN attached disk.
>
> *On the DR site:*
>
> They also have a TSM 2003 Standard Edition TSM server. When DR is to be
> tested / invoked, I would propose that they re-zone the DR TSM server to
> access the LUN that contains the DB and logs. Ensure that the DR TSM
> server's dsmserv.dsk points to the mapped drives.
>
> Note the the TSM tape library is also SAN attached.
>
> Any comments / experiences would be appreciated.
>
>
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