- NDMP is the only effective way to backup to tape a NAS with millions of files. Unfortunately, the TSM support for NDMP is minimal and incomplete. There is currently no way to make a second copy of the backup data to send offsite. This is rumored to be fixed in the next version of TSM. - The environment I work (NetApp 3020), the tape library is SAN switch attached and the NetApp sees it just fine. The TSM Admin Guide shows the supported tape connections. - NDMP appears stable. It is at version 4 and NetApp has had it implemented for quite a while. - You can configure TSM and NDMP to obtain a Table-of-Contents that allows single file restores from TSM/NDMP. - At my client, we have decided that tape is not a viable backup solution going forward. With many terabytes on our NetApp, we are going to use SnapShots for backup and and remote mirroring for DR. Overall, this provides a cleaner, cheaper to manage solution. Orville L. Lantto Glasshouse Technologies, Inc.
________________________________ From: ADSM: Dist Stor Manager on behalf of Wojtek Piecek Sent: Fri 3/10/2006 6:38 PM To: ADSM-L@VM.MARIST.EDU Subject: [ADSM-L] NDMP question/-s Hi All, I have some question about backup functionality of NetApp (FAS270). We have TSM server connected to Adic s10k library (2xlto2) and some stg pool on external storage. All via FC, but we don't use netfree for backup. So, my question is - what is preferred method of backup NetApp? We can use NDMP, but I heard: . NDMP sucks (it's file-serving oriented, so backup they CAN do, but poor than make that native b/a client) . NDMP probably need strange connection to library (one man from NetApp told us that FC build in them MUST be connected directly onto library, another man from TSM support that must be connect to SAN). Which is true? . NDMP isn't stable. We want to backup/archive business data, they MUST be readable in any time we hold this on TSM - some people, on that list too, isn't sure about that. . What about restoring ONE file from backup? Is it possible? Whiteout restoring full NAS? . Is it any other solution for backup NAS? Critical for us is backup acl for files/directories on NAS - we have heterogeneous network, we (plan to) connect to NAS from AIX, Linux (redhat and debian, but NFS, different version) and Windows.Any machine can write, any read, so it's very urgent to always have ACL. . single point of failure for NDMP via FC. . more? If anyone have experience in that, please write. -- --w