We are using BEST on HP, we have done numerous testing with new tapes and consistent data and compression has not been working since we switched over to the IBM library.
ReneƩ Carlisle Sr. Systems Administrator 675 Basket Road Webster, NY 14580 Jer 29:11-13 585-216-0497 (w) 585-472-2360 (c) -----Original Message----- From: Jeff Lightner [mailto:[EMAIL PROTECTED] Sent: Tuesday, April 18, 2006 2:42 PM To: Carlisle, D Renee; [EMAIL PROTECTED]; veritas-bu@mailman.eng.auburn.edu Subject: RE: RE: [Veritas-bu] Hardware compression not working Didn't respond earlier because I thought your post regarding Sun only. On HP the device's minor specifies settings of the drive's device entries - it will have several. You need to make sure your minor numbers are for the "Best" density which would include compression. Also as noted by another poster I have seen on HP-UX that when I wrote to a drive using its non-compressed device entry that subsequent writes to that device where I couldn't specify the density made it continue to write in a non-compressed mode. This was for a backup I was doing from the boot prompt (don't remember how exactly I did that). By booting up the OS then doing a short write to the device file that had compression enabled then going back down to the boot prompt I was able to make it write compression. Not sure how familiar with HP-UX you are. It has a command called "lssf" for listing special files. For tape devices it will show you detail. Example chosen at random from my HP-UX master server: lssf /dev/rmt/c9t3d5BEST stape card instance 9 SCSI target 3 SCSI LUN 5 at&t best density available at address 0/6/1/0/4/0.98.54.255.1.3.5 /dev/rmt/c9t3d5BEST Shows it is the best density available so I know it has compression. You might want to try running lssf on the devices you have configured in HP-UX to insure they have this. -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Carlisle, D Renee Sent: Tuesday, April 18, 2006 12:16 PM To: [EMAIL PROTECTED]; veritas-bu@mailman.eng.auburn.edu Subject: RE: RE: [Veritas-bu] Hardware compression not working I answered the compression issue in a previous post, we definitely are not getting compression. The reason I mentioned the library is that it does not seem to be at the hardware level since the tapes are obviously compressing on the test side of the world and we are using the same library. IBM, Sun, and Veritas are all involved right now (even though it is across HP, Sun, and Windows), but everyone is scratching their heads. Just trying to think outside the box now. ReneƩ Carlisle Sr. Systems Administrator 675 Basket Road Webster, NY 14580 Jer 29:11-13 585-216-0497 (w) 585-472-2360 (c) -----Original Message----- From: bob944 [mailto:[EMAIL PROTECTED] Sent: Tuesday, April 18, 2006 11:20 AM To: veritas-bu@mailman.eng.auburn.edu Cc: Carlisle, D Renee Subject: RE: RE: [Veritas-bu] Hardware compression not working > Date: Tue, 18 Apr 2006 10:42:58 -0400 > From: "Carlisle, D Renee" <[EMAIL PROTECTED]> What makes you believe that hardware compression is not working? I'd suggest proving the compression assertion first, then getting support people for the drive/library/drivers involved. ----------------------------------------- The information contained in this message may be privileged, confidential, and protected from disclosure. If the reader of this message is not the intended recipient, or any employee or agent responsible for delivering this message to the intended recipient, you are hereby notified that any dissemination, distribution, or copying of this communication is strictly prohibited. If you have received this communication in error, please notify us immediately by replying to the message and deleting it from your computer. Thank you. Paychex, Inc. _______________________________________________ Veritas-bu maillist - Veritas-bu@mailman.eng.auburn.edu http://mailman.eng.auburn.edu/mailman/listinfo/veritas-bu _______________________________________________ Veritas-bu maillist - Veritas-bu@mailman.eng.auburn.edu http://mailman.eng.auburn.edu/mailman/listinfo/veritas-bu