Brian Cuttler wrote: > Gene, > > I had no idea it was that difficult to reset. > > I apologize if I left the impression that I thought it > was an amanda issue, I was sure it was in the HW and > the driver, but I didn't express. > > In truth I seldom touch a drive for other amanda amanda > related work, only when assisting an end-user backing up > their own data or installing a new drive for an end-user use. > > On Fri, Mar 05, 2010 at 01:30:43PM -0500, Gene Heskett wrote: > > > On Friday 05 March 2010, Brian Cuttler wrote: > > > > > Rory, > > > > > > I may be wrong, nor my information obsolete for your tapedevice > > > but I seem to recall that if you want to actually turn off compression > > > you have to also relabel the tape. If it sees the amlabel was > > > written in compessed mode... > > > > > > > > Yes, back when I was using tape, that was a major problem, so much so that > > I > > finally read the first block of a new, but labeled, uncompressed tape, then > > used dd to write that first block to every tape on the premises, then > > forcibly relabeled them for my system. A certified PIMA... Then I bought > > another case of tape from ebay, they looked new, cello wrap & the whole > > maryann, but they weren't, and the whole scene had to be repeated, its a > > darned virus I think. > > > > This BTW, is not an amanda problem, its 100% the drive, it reads its own > > hidden header data while 'recognizing' or 'accepting' the tape, and sets > > the > > compression according to what it finds. So that gets reset to match the > > tape > > any time you do a rewind, so you must do the rewind, and THEN issue the > > compression off command, through mtx I think it was, and then, without > > accessing the drive, write the uncompressed first block. Never give it a > > chance to re-read that block until its done writing the new one.. > > > > > > > > > On Fri, Mar 05, 2010 at 12:21:32PM -0500, rory_f wrote: > > > > > > > Dustin J. Mitchell wrote: > > > > > > > > > On Fri, Mar 5, 2010 at 9:17 AM, rory_f <amanda-forum < at > > > > > > > > > > > > > > > backupcentral.com> wrote: > > > > > > > > > > > > > > > > > > > > i'm doing a tape run now, using the original tapetype definition, > > > > > > and > > > > > > it has filled a tape to around 238gb and moved onto the next one > > > > > > (well it has changed tapes,it's still waiting to write to tape) > > > > > > > > > > > > is this normal? > > > > > > > > > > > > > > > > Amanda treats any error from the tape drive as EOT. It's the nature > > > > > of UNIX kernel drivers that they don't give much more information than > > > > > that. So it's quite possible that your tape drive is failing, or the > > > > > tapes are failing, and intermittent errors are causing the early EOT > > > > > indication. > > > > > > > > > > Alternately, maybe the earlier amtapetype run was made with hardware > > > > > compression on? The size is about double.. > > > > > > > > > > Dustin > > > > > > > > > > > > > I made sure to turn compression off and also the output of the tapetype > > > > didn't mention compression was on - it normally does if it detects > > > > compression, right? > > > > > > > > Perhaps compression is turned on elsewhere - im not sure where though. > > > > So > > > > you think what is happening is the kernel thinks these tapes are only > > > > 200~gb and giving an EOT to amanda - when infact they are 400gb LTO3 > > > > tapes. > > > > > > > > I doubt the tapes are failing - but i mean it is possible, i've used the > > > > same type of tapes for over 400 tapes with amanda and never seen this > > > > issue. > > > > > > > > I'm guessing then it's the drive itself.. there's no real way to tell. > > > > This is our second tape drive, the one we have used more consistantly > > > > with Amanda is out being replaced as it died, too :/ > > > > > > > > I'll run a amtapetype again to make sure, i guess. > > > > > > > > +---------------------------------------------------------------------- > > > > > > > > |This was sent by rory < at > mrxfx.com via Backup Central. > > > > |Forward SPAM to abuse < at > backupcentral.com. > > > > > > > > +---------------------------------------------------------------------- > > > > > > > > > > --- > > > Brian R Cuttler brian.cuttler < at > wadsworth.org > > > Computer Systems Support (v) 518 486-1697 > > > Wadsworth Center (f) 518 473-6384 > > > NYS Department of Health Help Desk 518 473-0773 > > > > > > > > > > > > IMPORTANT NOTICE: This e-mail and any attachments may contain > > > confidential or sensitive information which is, or may be, legally > > > privileged or otherwise protected by law from further disclosure. It > > > is intended only for the addressee. If you received this in error or > > > from someone who was not authorized to send it to you, please do not > > > distribute, copy or use it or any attachments. Please notify the > > > sender immediately by reply e-mail and delete this from your > > > system. Thank you for your cooperation. > > > > > > > > > > > > -- > > Cheers, Gene > > "There are four boxes to be used in defense of liberty: > > soap, ballot, jury, and ammo. Please use in that order." > > -Ed Howdershelt (Author) > > > > You are as I am with You. > > > --- > Brian R Cuttler brian.cuttler < at > wadsworth.org > Computer Systems Support (v) 518 486-1697 > Wadsworth Center (f) 518 473-6384 > NYS Department of Health Help Desk 518 473-0773 > > > > IMPORTANT NOTICE: This e-mail and any attachments may contain > confidential or sensitive information which is, or may be, legally > privileged or otherwise protected by law from further disclosure. It > is intended only for the addressee. If you received this in error or > from someone who was not authorized to send it to you, please do not > distribute, copy or use it or any attachments. Please notify the > sender immediately by reply e-mail and delete this from your > system. Thank you for your cooperation.
Hey guys. Thanks I checked my library GUI and for the tape run i was just talking about, where it was stopping around 230gb, it seems compression WAS on. I turned it off via mt and now the gui says "off" (after stopping the run obviously) I was *sure* i turned it off with mt before. Im doing another amtapetype now. And the comment regarding labeling: thanks. I'll most certainly relabel all the tapes after this tapetype is done. Thanks again guys. +---------------------------------------------------------------------- |This was sent by [email protected] via Backup Central. |Forward SPAM to [email protected]. +----------------------------------------------------------------------
