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SAN attached tape library

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Hi,

We're debating on using a SAN attached tape libray. The senario is that we use SAN or disk for nightly backup then copy it to tapes during teh day. With SAN attached tape library, when doing copying data from disk, would the servers that have data resides on SAN and are attached to SAN be involved in the copying process?

Because if that is the case, wouldn't it slow down those servers during the day doing the copy?

Could someone please clear or explain the processes to me?

Thank you.
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Absent Member.
Absent Member.
Hi

As my opinion, this almost not impact to your system.
Why? As you said, you do a disk backup first (means that seperate with production storage), then backup from disk to tape.
With SAN, you can do this without any impact.

This is an advantage of backup architecture over SAN: Main storage ---> backup_to_disk ---->Backup_disk_to_tape.

With this model, the backup process doesn't impact to system during the backup time and don't take much time when backingup the data and also restore data.
Looking for a special chance.......

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Absent Member.
Absent Member.
Hi,

Yes, there is servers involved. The data is read from a source and written to a destination and this traffic go through one or more servers. Of course this will put some load on the server(s). But, not necessary (e.g.) the fileservers.

Perhaps you are thinking about direct backup but this is a totaly different concept.
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Hi, Leif,

Let's say Server A is a file server attached to SAN-A. Server B is also a file server but not attached to SAN-A. Server C is the cell manager DP 5.5 attached to SAN-B with virtual tape library installed. Tape library attached to SAN-B.

We use disk backup to backup Server A data on SAN-A and Server B data on its local drives to SAN-B, then use automated object copy to copy data from SAN-B to tapes.

So, when during the object copy, are server A & B involved in the process? Or, is it just between the SAN-B to tape library?

Thank you.
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Absent Member.
Absent Member.
Hi

As my opinion, this almost not impact to your system.
Why? As you said, you do a disk backup first (means that seperate with production storage), then backup from disk to tape.
With SAN, you can do this without any impact.

This is an advantage of backup architecture over SAN: Main storage ---> backup_to_disk ---->Backup_disk_to_tape.

With this model, the backup process doesn't impact to system during the backup time and don't take much time when backingup the data and also restore data.
Looking for a special chance.......

View solution in original post

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Absent Member.
Absent Member.
Hi,

In your configuration, only the Cell Manager is involved in the copy process.


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Thank you for all the replies.
Now I come to think of it. I must have mistaken the configuration of tape library attached to main storage on SAN for the
backup architecture over SAN: Main storage ---> backup_to_disk ---->Backup_disk_to_tape.

Thank you very much.
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