Re: TSM and Hard Disk Raid Configuration

I read Andy's post about mirroring and I agree. But I have an AIX group
that will not allow the TSM group to use ADSM mirroring because they say
the OS mirror is adequate. I didn't even think to argue the point about the
TSM database has to write successfully before it writes to the mirrors,
where the OS mirror doesn't care and your mirrors can get corrupted also.

Lovely forum

Thanks,
Robert Rippy.



From: "Thomas, Matthew" <Matthew.Thomas AT LLOYDSTSB.CO DOT UK> on 12/03/2002
      11:10 AM

Please respond to "ADSM: Dist Stor Manager" <ADSM-L AT VM.MARIST DOT EDU>

To:   ADSM-L AT VM.MARIST DOT EDU
cc:
Subject:  Re: TSM and Hard Disk Raid Configuration

On the subject of mirroring, see Andy Raibeck's earlier posting about
partial page writes....

http://msgs.adsm.org/cgi-bin/get/adsm/864.html

Matt Thomas

LTSB Storage Support
* e-mail            matthew.thomas AT Lloydstsb.co DOT uk



-----Original Message-----
From: Schoenleitner Thomas [mailto:thomas.schoenleitner AT SGKK.SOZVERS DOT AT]
Sent: 03 December 2002 14:41
To: ADSM-L AT VM.MARIST DOT EDU
Subject: TSM and Hard Disk Raid Configuration


Hi there!

our tsm server got out of disk space and I want to reinstall the complete
system,
but I don't know the best configuration of the raid system.
raid1, raid1E, raid5 ?
where to put the database volumes
logfile, system, disk storage group volumes...
a lot of questions...
is it really nescesarry to use copy database volumes
should tsm do the mirroring of the data base volumes or hardware raid?
perfomance - security?

now a short description of my system:
TSM Server 4.2.2.5
Windows 2000 SP3
IBM Netfinity 5500
Dual PIII 550Mhz
512MB RAM
IBM ServeRaid II
4MM Tape
IBM 3583-72 incl. 2 drives

Harddisks now in the system:
3 x 9GB SCSI (non raid)
1 x 80GB IDE
1st SCSI disk = system (w2k, tsm)
2nd = db volumes, dblog
3rd = db copy volumes, dblog copy
ide = disk storage group

Harddisks available for future:
3 x 9GB SCSI
5 x 36GB SCSI
(all SCSI disk hot-plugable, but there is only space for 6 disks in the
system)
1 x 80GB IDE

i thought 3x9gb + 3x36gb raid5 is ok, but I am not sure, because of the db
copy volumes...
or 2x9gb + 4x36gb raid1...

does anyone has any suggestions for my problem?

thanks
thomas

ps: what do you think about upgrading to TSM 5.1


-----------------------------------------------------------------------------------------------------------------------
This e-mail is intended only for the above addressee.  It may contain
privileged information. If you are not the addressee you must not copy,
distribute, disclose or use any of the information in it.  If you have
received it in error please delete it and immediately notify the sender.

evolvebank.com is a division of Lloyds TSB Bank plc.
Lloyds TSB Bank plc, 71 Lombard Street, London EC3P 3BS.  Registered in
England, number 2065.  Telephone No: 020 7626 1500
Lloyds TSB Scotland plc, Henry Duncan House, 120 George Street,
Edinburgh EH2 4LH.  Registered in Scotland, number 95237.  Telephone
No: 0131 225 4555

Lloyds TSB Bank plc and Lloyds TSB Scotland plc are regulated by the
Financial Services Authority and represent only the Scottish Widows
and Lloyds TSB Marketing Group for life assurance, pensions and
investment business.

Signatories to the Banking Codes.
-----------------------------------------------------------------------------------------------------------------------