Eric, this looks really strange. have you also tried to define a devclass with recording format 3570C ? ( just a try )
herfried Eric Winters <[EMAIL PROTECTED]>@VM.MARIST.EDU> on 17.10.2001 08:05:06 Please respond to "ADSM: Dist Stor Manager" <[EMAIL PROTECTED]> Sent by: "ADSM: Dist Stor Manager" <[EMAIL PROTECTED]> To: [EMAIL PROTECTED] cc: Subject: Hardware compression has stopped working on 3570 drives Dear TSM Community, I have a situation in which I appear to have lost hardware compression on both my 3570-C drives. We recently had one of two tape drives in a 3575 replaced, and since then I'm only getting 5 GB a tape, in spite of my device class being set to format=drive (not that I have changed this). I do not compress at the client. Here are the headlines; TSM Client is at 4.1.3.0 TSM Server is at 4.1.4.1 The drives are enabled for hardware compression (lsattr -El rmt0 shows "Hardware enabled for compression: TRUE") Atape.driver has been updated to 6.1.9 The 3570 Firmware has been updated to 5468 I have green 3570 tapes. I have deleted the drives in TSM, deleted the devices in aix, recreated the devices, redefined the drives. Backing up approx 1GB with dsmc sel and no software compression utilises 20% of a tape. Backing up approx 1 GB with dsmc sel and software compression (reporting 50% compression) utilises 10% of a tape. So I know the data is compressable. The devclass has a setting of FORMAT=DRIVE. I've tried making a new device class with a new tape storage pool and backing up to that with TSM but there's no relief - I'm still only getting 5 GB per tape for data which has NOT been compressed by the client. I've just used tar to back up 12 GB of data successfully to one of the drives - so it looks like TSM is the problem. Any ideas? As a consequence of this problem my scratch tapes have rapidly been consumed and I could do with a brilliant suggestion. Thanks in advance. Eric Winters **************************************************************************** The information contained in this transmission, which may be confidential and proprietary, is only for the intended recipients. Unauthorized use is strictly prohibited. If you receive this transmission in error, please notify me immediately by telephone or electronic mail and confirm that you deleted this transmission and the reply from your electronic mail system. ****************************************************************************
