Re: DS4500 and TSM?
2004-09-15 10:05:58
Are you sure that the FLASHCOPY feature doing a point in time copy does not
need enough space available to make a full copy? That has been the number 1
knock against the FlashCopy function. I realize that it will not make a full
copy unless it had to. But I thought that there had to be enough physical
space available and pre allocated to make that copy.
Matt
-----Original Message-----
From: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU] On Behalf Of
Daniel Sparrman
Sent: Wednesday, September 15, 2004 4:55 AM
To: ADSM-L AT VM.MARIST DOT EDU
Subject: Re: DS4500 and TSM?
Hi
Yes, it would be possible, given the following conditions:
1. The end system has to be running AIX so that your TSM server can mount the
volume in question 2. The TSM server has to be within the same storage
partition in your FAStT subsystem so that the TSM server can get access to the
snapshot volume.
Though it's possible, it's going the hard way. It would be alot easier to
utilize LAN-free capabilities, as automating this procedure would take alot of
scripting, and lots of engineering on your FAStT.
FlashCopy = Immediate copy. Not copying the whole volume at once, but only
creating a second table of contents of an existing volume. This also means that
the new flashcopy volume has ties to the original volume.
VolumeCopy = Replicating two different logical volumes. Replicate information
stored in one logical volume onto another logical volume. The two logical
volumes doesnt have any ties to eachother.
>From the IBM website:
"VolumeCopy option provides full logical drive replication within the FAStT700
with enhanced data management and protection."
"FlashCopy feature creates a point-in-time (PiT) image of a volume?the
equivalent of a complete physical copy but created much more quickly and
requiring less disk space. FlashCopy volumes are host-addressable and function
as normal volumes with complete read and write access. The FlashCopy feature
uses an innovative copy-on-write technology to maintain the logical FlashCopy
volume while reducing disk utilization. A repository volume stores only the
data blocks that have changed since the time of the last use of the FlashCopy
feature."
Best Regards
Daniel Sparrman
-----------------------------------
Daniel Sparrman
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183 62 TÄBY
Växel: 08 - 754 98 00
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Mike <mikee AT MIKEE.ATH DOT CX>
Sent by: "ADSM: Dist Stor Manager" <ADSM-L AT VM.MARIST DOT EDU>
2004-09-13 17:07
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Subject
DS4500 and TSM?
Given the DS4500 has FlashCopy and VolumeCopy (what's this?), is there
someway such that the TSM server (on AIX) can attach to the area that
contains a FlashCopy backup to push that area directly to disk without
involving the end server (possibly Windows/Exchange)?
Does that make sense? :)
Mike
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