Amon Posted August 15, 2006 Report Share Posted August 15, 2006 Hi, A customer of mine just got his server stolen (machine running OSX 10.4.6 Server) and i'm currently attempting to recover their data from a backup. Since their tapedrive is SCSI based i'm using a G3 running OSX 10.2.8, and an adaptec scsi card (29160). Rebuilding the catalog from the tapes seems to work, however, when attempting to actually restore anything, i get the -24201 error (chunk checksum didn't match), i get this error immediatly, even before any tape access occurs, wich means i can not recover any data. Does anyone know a workarround to this rather frustrating issue? The retrospect version is 6.1.126, the tapedrive is a Lacie D2 DDS4 drive (Sony mechanism inside) Quote Link to comment Share on other sites More sharing options...
rhwalker Posted August 15, 2006 Report Share Posted August 15, 2006 Not sure whether this is any help on this particular issue, but how do you plan to restore the 10.4.6 metadata (e.g., ACLs) doing the restore running 10.2.8 ? What RDU are you using? (I think that the current one for Retrospect 6.1.126 is 6.1.6.100) Is this the same tape drive that created the tapes? Is there a reasonable amount of memory in the G3? could be lots of files on the tapes. Suggest to your customer that they contact Apple - 10.4.6 server (and later) phones home when certain events occur (software update server, etc.) so that the serial number could be used to identify the IP of the stolen server, and if anyone takes it in for service, the Apple Store might catch it, too. Quote Link to comment Share on other sites More sharing options...
Amon Posted August 15, 2006 Author Report Share Posted August 15, 2006 The version of Retrospect is 6.1.126, I couldn't care less about losing the ACL's, since the server is gone i have to get access to the data to copy it to a new machine. Unfortunatly, the only machine available to me with a suitable scsi connection is this old G3 (with 256MB ram) running 10.2.8, i might be able to squize 10.4 onto it, tho It's the same drive. Quote Link to comment Share on other sites More sharing options...
waltr Posted August 15, 2006 Report Share Posted August 15, 2006 hi amon, make sure you've got the correct driver installed: http://kb.dantz.com/display/2/index.asp?...amp;r=0.5095636 Quote: PowerDomain 29160 (Requires Mac OS X 10.2.2 with Adaptec driver 1.2 or later) Quote Link to comment Share on other sites More sharing options...
Amon Posted August 15, 2006 Author Report Share Posted August 15, 2006 Updated the driver, the catalog still gave me the checksum error, so i'll try rebuilding it, will let you know what it gives Quote Link to comment Share on other sites More sharing options...
CallMeDave Posted August 15, 2006 Report Share Posted August 15, 2006 Before the server was lost, when you did random test restores using this same Backup Set, did everything work as expected? Quote Link to comment Share on other sites More sharing options...
Amon Posted August 15, 2006 Author Report Share Posted August 15, 2006 Yep Quote Link to comment Share on other sites More sharing options...
Amon Posted August 15, 2006 Author Report Share Posted August 15, 2006 Rebuild just finished, problem persists, if anyone has any clue how to extract the data, please let me know. The tape definatly has the data, during the rebuild procedure it actually lists filenames as it examines the tapes, but the bloody catalog keeps being bad Quote Link to comment Share on other sites More sharing options...
waltr Posted August 15, 2006 Report Share Posted August 15, 2006 hmm, FWIW i'd try this card on another PCI slot, and maybe another machine. keep in mind that you will want to use 10.2.X with this card & of course check the driver. where did the card come from? and how long ago did it see any use? is there any other device on the SCSI chain? i've had problems with cards not being seated correctly, bad PCI slots, and just plain bad SCSI cards that i pulled out of an old file cabinet. with older hardware it's sometimes difficult to tell where the problem lies without a lot of testing. try to isolate the problem if you can. if this restore is time critical i'd suggest giving EMC Technical Support a call. they may be able to do more with this kind of problem. Quote Link to comment Share on other sites More sharing options...
rhwalker Posted August 15, 2006 Report Share Posted August 15, 2006 Quote: hi amon, make sure you've got the correct driver installed: http://kb.dantz.com/display/2/index.asp?...amp;r=0.5095636 Quote: PowerDomain 29160 (Requires Mac OS X 10.2.2 with Adaptec driver 1.2 or later) Walt, you were bitten by the )(&*@#$ frames in the KB when you copied your link. Glad to see that I'm not the only one it bites. The correct URL is: KB article 5642 At some point, someone with free time ought to change the KB search page to eliminate the frames, or at least put the "Bookmark" link in big letters (or change the wording of that link to "Get a useful URL"). Russ Quote Link to comment Share on other sites More sharing options...
waltr Posted August 15, 2006 Report Share Posted August 15, 2006 hi russ, thanks for the correction, it's definitely confusing sometimes. FWIW--i always hit (except this time?) the 'Email' link and cut & paste the one that would be sent out. Quote Link to comment Share on other sites More sharing options...
CallMeDave Posted August 15, 2006 Report Share Posted August 15, 2006 Quote: when attempting to actually restore anything, i get the -24201 error (chunk checksum didn't match), i get this error immediatly, even before any tape access occurs I'd be curious as to how the catalog behaves if you yank the host adapter out of the machine entirely. Do you get the same error, or does Retrospect complain about the lack of a device before that point. If you get the checksum error without the card in the box it would imply that the catalog you have is bad. That would imply that the problem was with the rebuild, not with the restore. And while that knowledge isn't a solution in iteslf, it might help you from chasing any wild geese. Quote Link to comment Share on other sites More sharing options...
Amon Posted August 15, 2006 Author Report Share Posted August 15, 2006 Haven't tried ripping out the scsi card yet, but i did try opening the catalog on another mac without scsi-card, i received the identical error. It seems that for some reason or another retrospect is generating currupt catalog files, as to why, i haven't got the faintest idea Quote Link to comment Share on other sites More sharing options...
Amon Posted August 15, 2006 Author Report Share Posted August 15, 2006 Quote: hmm, FWIW i'd try this card on another PCI slot, and maybe another machine. keep in mind that you will want to use 10.2.X with this card & of course check the driver. I'll do that tomorrow, it's already past midnight now Quote: where did the card come from? and how long ago did it see any use? is there any other device on the SCSI chain? This card was already present in the G3 (this machine used to be the server way back), no other scsi devices present. Quote: i've had problems with cards not being seated correctly, bad PCI slots, and just plain bad SCSI cards that i pulled out of an old file cabinet. with older hardware it's sometimes difficult to tell where the problem lies without a lot of testing. I'll try that tomorrow Quote: try to isolate the problem if you can. if this restore is time critical i'd suggest giving EMC Technical Support a call. they may be able to do more with this kind of problem. Been thinking about that (the calling EMC thingie), will see what further tests give Quote Link to comment Share on other sites More sharing options...
Amon Posted August 16, 2006 Author Report Share Posted August 16, 2006 Well, i guess i have some good news, i managed to rebuild a catalog and read it's contents by using a G4 with OSX 10.4.7 & RetroSpect 6.1.126, restoring doesn't work just yet though, as the machine has the tendency to kernel panic on me. Does anyone have any recommandations for a scsi card that works in a G4 under 10.4.7? Quote Link to comment Share on other sites More sharing options...
waltr Posted August 16, 2006 Report Share Posted August 16, 2006 hi amon, ATTO is the name you want. the UL3S and UL4S cards are what you should look at. cheers. Quote Link to comment Share on other sites More sharing options...
rhwalker Posted August 16, 2006 Report Share Posted August 16, 2006 ATTO. If you are going to do it on a G4, which, I believe, has PCI slots (not PCI-X or PCIe), you will need an ATTO UL3S (single channel Ultra 160 SCSI LVD) or UL3D (dual channel version). Both are discontinued products, but you might be able to find one used for a good price. Good Luck. Update the firmware. Might be better to get a UL4S or UL4D (PCI-X) for the replacement G5 or UL5D for a replacement Mac Pro server. Your comments about lack of success with catalog rebuilt on G3 leads me to wonder whether there is a software bug in Retrospect 6.1 when run on a G3. Never done that myself, only used it on our Xserve G5. Russ Quote Link to comment Share on other sites More sharing options...
Amon Posted August 17, 2006 Author Report Share Posted August 17, 2006 Thx for all the replies, successfully extracted the tape's contents, so all is well. Cheers all! Quote Link to comment Share on other sites More sharing options...
CallMeDave Posted August 17, 2006 Report Share Posted August 17, 2006 Yeah!!! Quote Link to comment Share on other sites More sharing options...
waltr Posted August 17, 2006 Report Share Posted August 17, 2006 excellent news! if you check back, details on how you fixed it would be interesting.... Quote Link to comment Share on other sites More sharing options...
Amon Posted August 18, 2006 Author Report Share Posted August 18, 2006 I used a G4 running OSX 10.4.6 with the 29160 Adaptec card and the beta (1.3) drivers from adaptec. It seems that the difference in OSes was the problem, and the 1.2 drivers aren't exactly "right" for 10.4, the beta ones actually seem very stable. Quote Link to comment Share on other sites More sharing options...
CallMeDave Posted August 18, 2006 Report Share Posted August 18, 2006 Quote: I used a G4 running OSX 10.4.6 with the 29160 Adaptec card and the beta (1.3) drivers from adaptec. .. (sound of Dave's head exploding) .. While it's WONDERFUL that you were able to get your data back using an Adaptec host adapter under Tiger, please do _not_ rely on this combination for your future backup needs. It has shown itself in the field to be quite unreliable. Dave Quote Link to comment Share on other sites More sharing options...
rhwalker Posted August 18, 2006 Report Share Posted August 18, 2006 Quote: .. (sound of Dave's head exploding) .. Sorry to hear about that, Dave. We will miss you. Wikipedia Exploding Head Russ Quote Link to comment Share on other sites More sharing options...
Amon Posted August 21, 2006 Author Report Share Posted August 21, 2006 Quote: Quote: I used a G4 running OSX 10.4.6 with the 29160 Adaptec card and the beta (1.3) drivers from adaptec. .. (sound of Dave's head exploding) .. While it's WONDERFUL that you were able to get your data back using an Adaptec host adapter under Tiger, please do _not_ rely on this combination for your future backup needs. It has shown itself in the field to be quite unreliable. Dave Heh, i know, but it was the only hardware i had available to me at the time, the new server will be using a FW based tape drive Quote Link to comment Share on other sites More sharing options...
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