We have 2 EMC CDL740's which we use as 4 non-redundant VTL's (740 is the
redundant CDL version)  We have been running about 10 months.  Our TSM
servers do not have the I/O capacity to exceed the CDL's I/O so I can
only say they are faster than a 4 CPU 6H1.  We have had 2 crashes of one
CDL server.  Other than that we have been extremely happy with them.  We
have saved money versus buying more tapes which includes buying more VTL
space.
EMC does use 500GB ATA disks in RAID 3 groups.

With a VTL, you should really think about what happens when you
collocate.  We setup our VTLs to where we did not oversubscribe the
available space because we do not collocate.

Our setup:
2x AIX 6H1
TSM 5.2.2.4
2x CDL740 (non-redundant)
18x 3590-E drives (off-site tape)

4.3TB per day
Disk then fake tape
Offsite on not fake tape

Andy Huebner

-----Original Message-----
From: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU] On Behalf Of
Nancy L Backhaus
Sent: Wednesday, December 06, 2006 2:20 PM
To: ADSM-L AT VM.MARIST DOT EDU
Subject: [ADSM-L] Survey Question for Virtual Tape Users: What Vendors
are you using for Virtual Tape?

Background:
Tivoli Storage Manager Extended Edition 5.3.2.2
Op System AIX 5.3 ML 3
Nightly Backup 2 -2 1/2 TB
Library - ADIC I2000 Scalar
18 LTO Tape Drives
LTO 2 Tapes
600 slots
Clients - 135 (Wintel)
AIX -26 (Sybase, SQL, and DB2)

We are looking into Virtual Tape Technology for our environment.    1
1/2s
TB data first backs up to disk then to onsite tape then we make a backup
of our onsite tape to a copy stgpool and store those tapes offsite  for
disaster recovery.    The other 1 TB of data is a DB2 database that we
back up directly to onsite tape and of course make a copy of the onsite
tape to offsite tape for disaster recovery.   We can't get our backups
done and out the door to meet our RTO objective.     We are looking to
add
a VTL and reduce our tape drive and slot capacity in a new library  to
offset some of the cost for a virtual tape library.    We would like to
also take advantage of collocation and setup library sharing too.


I would like to know what vendors you are using for virtual tape?

Pros/Cons(Any regrets, Success Stories).



Thank You.


Nancy Backhaus
Enterprise Systems
(716)887-7979
HealthNow, NY
716-887-7979

CONFIDENTIALITY NOTICE: This email message and any attachments are for
the sole use of the intended recipient(s) and may contain proprietary,
confidential, trade secret or privileged information.  Any unauthorized
review, use, disclosure or distribution is prohibited and may be a
violation of law.  If you are not the intended recipient or a person
responsible for delivering this message to an intended recipient, please
contact the sender by reply email and destroy all copies of the original
message.


This e-mail (including any attachments) is confidential and may be legally 
privileged. If you are not an intended recipient or an authorized 
representative of an intended recipient, you are prohibited from using, copying 
or distributing the information in this e-mail or its attachments. If you have 
received this e-mail in error, please notify the sender immediately by return 
e-mail and delete all copies of this message and any attachments.
Thank you.