Ricky, The Isilon uses the OneFS file system and TSM views it as one huge file system. If backing up to disk, TSM will attempt to preallocate enough space to back up the entire allocated space on the Isilon. Defining Virtual File systems will not help because directory quota information is not passed to TSM, and TSM only sees the total allocated space.
We were able to back up the Isilon to disk when we started on a test system with little data on it, around 25 GB. When we attempted to implement the same backups on a second, well-populated Isilon we ran into the space allocation problem. When backing up to tape, TSM assumes you have unlimited storage available and is able to run VFS backups. We use Virtual File Space Mapping (VFS) and back up to tape. Refer to EMC SR#55554646, TSM PMR 23808,122,000. Jim Schneider United Stationers -----Original Message----- From: ADSM: Dist Stor Manager [mailto:ADSM-L@VM.MARIST.EDU] On Behalf Of Plair, Ricky Sent: Tuesday, July 15, 2014 1:21 PM To: ADSM-L@VM.MARIST.EDU Subject: [ADSM-L] Question about NDMP and TSM. I have been asked to look into backing up our EMC Isilon using our TSM server. Everything I read, seems to point to backing this NDMP device to tape. Problem is, we do not use tape to backup production. I have researched and found a few articles about backing the NDMP device to tape but, there seem to be more cons than pros. Is there anybody backing up a NDMP device to disk that can give me some pros and, how they are using disk for this task. I appreciate your time! _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ CONFIDENTIALITY NOTICE: This email message, including any attachments, is for the sole use of the intended recipient(s) and may contain confidential and privileged information and/or Protected Health Information (PHI) subject to protection under the law, including the Health Insurance Portability and Accountability Act of 1996, as amended (HIPAA). If you are not the intended recipient or the person responsible for delivering the email to the intended recipient, be advised that you have received this email in error and that any use, disclosure, distribution, forwarding, printing, or copying of this email is strictly prohibited. If you have received this email in error, please notify the sender immediately and destroy all copies of the original message. ********************************************************************** Information contained in this e-mail message and in any attachments thereto is confidential. If you are not the intended recipient, please destroy this message, delete any copies held on your systems, notify the sender immediately, and refrain from using or disclosing all or any part of its content to any other person.