"ADSM: Dist Stor Manager" <[email protected]> wrote on 06/28/2007 01:02:27 PM: > The compression algorithms in tape drive hardware are usually the > best, and though will attempt compression per your settings, the data > will not expand as in some host software compression algorithms.
A long time ago we used AIT1 tape drives. AIT1 drives used a IBM compression chip. I was able to find a document for that chip that described many of it's operations. It stated that if data was uncompressable, the data was passed through as-is. In other words, it handled the case of trying to compress a already compressed data stream. Since then, I haven't worried about this issue, reguardless of the type of drive. We let the drives compress regardless of what we send - and we do send a broad mix of compressed and uncompressed data. Rick ----------------------------------------- The information contained in this message is intended only for the personal and confidential use of the recipient(s) named above. If the reader of this message is not the intended recipient or an agent responsible for delivering it to the intended recipient, you are hereby notified that you have received this document in error and that any review, dissemination, distribution, or copying of this message is strictly prohibited. If you have received this communication in error, please notify us immediately, and delete the original message.
