Re: SCSI Tape Drive Problems
On Wed, Dec 20, 2006, at 11:14:57 -0600, Dan Nelson wrote: In the last episode (Dec 20), Mark Kane said: Thanks very much for the replies. Both drives are external, and they both have terminators on the back. The setup is like this: The DDS autoloader is connected to the back of the Adaptec card via a new external HD68 cable and the terminator that came with the drive is on the second plug of the unit. The Sun DLT drive is connected via an external HD50 cable to an adaptor that turns it into an internal cable which is then connected to the Adaptec card internally. It has a Sun terminator on the second plug on the unit. The cable that connects the DDS autoloader is brand new. It's not a major brand name, but it's listed as double shielded, UL20276 listed, etc. The cable that connects the DLT unit is an older Adaptec one (possibly used) purchased for a few dollars locally. I could understand if that cable was a problem for writing using that drive, but having the issue on both drives like this with two separate cables just seems like it's something else. By the way, the green LEDs on both terminators are illuminated so they should be working. All that looks okay to me. Try reposting your question to the [EMAIL PROTECTED] list. Thanks again for the responses. Before I bug scsi@, I have a little more information now that might help. I'll try to keep it simple. When using pax, both drives write more data and get further than before with cpio. The DLT (which previously gave those SCSI errors after writing ~200 or ~500MB) can now write the full 17GB directory fine with pax and without any SCSI errors or tape full problems. If I try to add my 1.6GB mail directory onto that, it errors out with tape full after about half my mail directory...so for simplicity's sake, it stops at around 18GB with a tape full error. On the DDS drive, pax gets considerably farther than cpio but still cannot write the full 17GB directory. With pax, it errors out with a tape full error pretty close to the end of that 17GB, but will never complete it. The files themselves inside those directories are of varying sizes, however no single file is over 2GB. So now I think it's pretty much down to drives saying the tape is full before it really is without any specific SCSI errors anymore. -Mark -- Internet Radio: Party107 (Trance/Electronic) - http://www.party107.com Rock 101.9 The Edge (Rock) - http://www.rock1019.net IRC: MIXXnet IRC Network - irc.mixxnet.net (Nick: MIXX941) ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: SCSI Tape Drive Problems
On Tue, Dec 19, 2006, at 23:16:45 -0600, Dan Nelson wrote: Timeouts and unexpected busfree errors like these are indicative of cabling or termination problems. I don't think DLTs auto-terminate, for example, so try putting an external terminator on the 2nd plug on the back of the unit (or if it's an internal drive with one plug, terminate the cable the drive's plugged into). Once you get those errors sorted out, see whether you still get incorrect volume full messages. Thanks very much for the replies. Both drives are external, and they both have terminators on the back. The setup is like this: The DDS autoloader is connected to the back of the Adaptec card via a new external HD68 cable and the terminator that came with the drive is on the second plug of the unit. The Sun DLT drive is connected via an external HD50 cable to an adaptor that turns it into an internal cable which is then connected to the Adaptec card internally. It has a Sun terminator on the second plug on the unit. The cable that connects the DDS autoloader is brand new. It's not a major brand name, but it's listed as double shielded, UL20276 listed, etc. The cable that connects the DLT unit is an older Adaptec one (possibly used) purchased for a few dollars locally. I could understand if that cable was a problem for writing using that drive, but having the issue on both drives like this with two separate cables just seems like it's something else. By the way, the green LEDs on both terminators are illuminated so they should be working. With the DDS drive, it does not give any errors to /var/log/messages like the DLT drive does. cpio just quits with that Internal overflow, aborting error (which doesn't happen with the DLT). Do you guys know specifically what that message means? With the DLT drive, cpio actually gives the volume full errors but with the DDS it's only Internal Overflow and nothing else anywhere that I can see. Internet searches for the Internal Overflow message have not turned up much helpful information. Thanks again. -Mark -- Internet Radio: Party107 (Trance/Electronic) - http://www.party107.com Rock 101.9 The Edge (Rock) - http://www.rock1019.net IRC: MIXXnet IRC Network - irc.mixxnet.net (Nick: MIXX941) ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: SCSI Tape Drive Problems
You can get ringing on a SCSI device from bad or loose cabling which will generate a lot of SCSI errors. There are limits to cable lengths and you need to be sure you use proper cables for every device (and rated for the SCSI bus speed.) You will do best to pull out any un-necessary hardware, use a minimal hardware setup. You should also run diagnostics from the drive manufacturer and verify the tape and drive. Last thing be sure to erase the tape before testing it. -Derek At 02:09 AM 12/20/2006, Mark Kane wrote: On Tue, Dec 19, 2006, at 23:16:45 -0600, Dan Nelson wrote: Timeouts and unexpected busfree errors like these are indicative of cabling or termination problems. I don't think DLTs auto-terminate, for example, so try putting an external terminator on the 2nd plug on the back of the unit (or if it's an internal drive with one plug, terminate the cable the drive's plugged into). Once you get those errors sorted out, see whether you still get incorrect volume full messages. Thanks very much for the replies. Both drives are external, and they both have terminators on the back. The setup is like this: The DDS autoloader is connected to the back of the Adaptec card via a new external HD68 cable and the terminator that came with the drive is on the second plug of the unit. The Sun DLT drive is connected via an external HD50 cable to an adaptor that turns it into an internal cable which is then connected to the Adaptec card internally. It has a Sun terminator on the second plug on the unit. The cable that connects the DDS autoloader is brand new. It's not a major brand name, but it's listed as double shielded, UL20276 listed, etc. The cable that connects the DLT unit is an older Adaptec one (possibly used) purchased for a few dollars locally. I could understand if that cable was a problem for writing using that drive, but having the issue on both drives like this with two separate cables just seems like it's something else. By the way, the green LEDs on both terminators are illuminated so they should be working. With the DDS drive, it does not give any errors to /var/log/messages like the DLT drive does. cpio just quits with that Internal overflow, aborting error (which doesn't happen with the DLT). Do you guys know specifically what that message means? With the DLT drive, cpio actually gives the volume full errors but with the DDS it's only Internal Overflow and nothing else anywhere that I can see. Internet searches for the Internal Overflow message have not turned up much helpful information. Thanks again. -Mark -- Internet Radio: Party107 (Trance/Electronic) - http://www.party107.com Rock 101.9 The Edge (Rock) - http://www.rock1019.net IRC: MIXXnet IRC Network - irc.mixxnet.net (Nick: MIXX941) ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED] -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean. MailScanner thanks transtec Computers for their support. -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean. MailScanner thanks transtec Computers for their support. ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: SCSI Tape Drive Problems
In the last episode (Dec 20), Mark Kane said: On Tue, Dec 19, 2006, at 23:16:45 -0600, Dan Nelson wrote: Timeouts and unexpected busfree errors like these are indicative of cabling or termination problems. I don't think DLTs auto-terminate, for example, so try putting an external terminator on the 2nd plug on the back of the unit (or if it's an internal drive with one plug, terminate the cable the drive's plugged into). Once you get those errors sorted out, see whether you still get incorrect volume full messages. Thanks very much for the replies. Both drives are external, and they both have terminators on the back. The setup is like this: The DDS autoloader is connected to the back of the Adaptec card via a new external HD68 cable and the terminator that came with the drive is on the second plug of the unit. The Sun DLT drive is connected via an external HD50 cable to an adaptor that turns it into an internal cable which is then connected to the Adaptec card internally. It has a Sun terminator on the second plug on the unit. The cable that connects the DDS autoloader is brand new. It's not a major brand name, but it's listed as double shielded, UL20276 listed, etc. The cable that connects the DLT unit is an older Adaptec one (possibly used) purchased for a few dollars locally. I could understand if that cable was a problem for writing using that drive, but having the issue on both drives like this with two separate cables just seems like it's something else. By the way, the green LEDs on both terminators are illuminated so they should be working. All that looks okay to me. Try reposting your question to the [EMAIL PROTECTED] list. With the DDS drive, it does not give any errors to /var/log/messages like the DLT drive does. cpio just quits with that Internal overflow, aborting error (which doesn't happen with the DLT). Do you guys know specifically what that message means? With the DLT drive, cpio actually gives the volume full errors but with the DDS it's only Internal Overflow and nothing else anywhere that I can see. Internet searches for the Internal Overflow message have not turned up much helpful information. If you look at the source to cpio, you can see in copyout.c, that message is printed if a sprintf'ed header is larger than cpio expected it to be. My guess is one of your files is over 10gb and the file size overflowed its 11-digit field. -- Dan Nelson [EMAIL PROTECTED] ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
SCSI Tape Drive Problems
Hi everyone. I'm experiencing some problems with two tape drives attached to this machine. Here is the situation: I first tried backing up 17GB of data using cpio to a six tape DDS-4 autoloader with a fresh 20GB/40GB Fuji tape. It stopped writing after about 9GB and gave the following error message on the command line, but didn't output anything to /var/log/messages: Internal overflow, aborting If I try to use tar instead of cpio and backup the same 17GB directory to the same 20GB native tape, it will give a tape full error way before completing. With that six tape autoloader, I have tried with two different brand new DDS-4 20/40 tapes, and the unit itself is brand new from the factory and has only written a few GB so far (mainly smaller files, which seemed to work fine). I then tried backing up the same 17GB directory to a Sun DLT 4000 single tape unit with a 20GB/40GB tape using cpio. It wrote about 250MB and then quit with a Found End of Volume error. It outputted a lot of errors to /var/log/messages which can be found here: http://tntpowerhost.com/mixx941/freebsd/sun_tape_errors_1.log I did another test on the same Sun DLT 4000 with a smaller 1.5GB directory and a different tape. This time it wrote about 550MB and then gave the same Found End of Volume message as before. This time there were even more errors in /var/log/messages: http://tntpowerhost.com/mixx941/freebsd/sun_tape_errors_2.log I also tested with the smaller 1.5GB directory to the DDS-4 autoloader, however that did complete without error. At this point I was running 6.2-PRERELEASE #18: Wed Nov 15 11:12:09 from last month, so today I cvsupped to RELENG_6 and rebuilt. Trying the same 1.5GB directory using the Sun DLT 4000 after the update resulted in it writing about 200MB of data and then stopping with the Found end of volume message again, as well as errors in /var/log/messages (however not as many this time): http://tntpowerhost.com/mixx941/freebsd/sun_tape_errors_3.log Any suggestions on what to check or any ideas on how to proceed would be great. I don't think it's both tape drives failing or bad tapes because pretty much the same thing happens with two different drives (one of which is completely new), and four different tapes (two of those completely new). I suppose it could be a problem with the SCSI controller (Adaptec 2940U2W), but I'd like to rule out any software issues before having to buy any additional hardware. Thanks very much in advance. -Mark Dmesg: http://tntpowerhost.com/mixx941/freebsd/dmesg.121906 -- Internet Radio: Party107 (Trance/Electronic) - http://www.party107.com Rock 101.9 The Edge (Rock) - http://www.rock1019.net IRC: MIXXnet IRC Network - irc.mixxnet.net (Nick: MIXX941) ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: SCSI Tape Drive Problems
In the last episode (Dec 19), Mark Kane said: Hi everyone. I'm experiencing some problems with two tape drives attached to this machine. Here is the situation: I then tried backing up the same 17GB directory to a Sun DLT 4000 single tape unit with a 20GB/40GB tape using cpio. It wrote about 250MB and then quit with a Found End of Volume error. It outputted a lot of errors to /var/log/messages which can be found here: http://tntpowerhost.com/mixx941/freebsd/sun_tape_errors_1.log Timeouts and unexpected busfree errors like these are indicative of cabling or termination problems. I don't think DLTs auto-terminate, for example, so try putting an external terminator on the 2nd plug on the back of the unit (or if it's an internal drive with one plug, terminate the cable the drive's plugged into). Once you get those errors sorted out, see whether you still get incorrect volume full messages. Completely unrelated, but it's interesting that the string SCBs in those logs got translated to SCDel! I've never seen Backspace-Delete conversion like that before :) -- Dan Nelson [EMAIL PROTECTED] ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: SCSI Tape Drive Problems
That's hardware, most likely scsi termination issues or cabling issues. I have seen these errors lots of times when using a high speed scsi controller on a tape drive. Sometimes you can play with the settings on the controller or flip switches on the drive to get things to work, sometimes you can use better cables and get things to work, usually I just go get an older, slower scsi controller. There's a computer recycler here that has stacks of aha 2940's (not the ultra ones) for a couple bucks a card. Ted - Original Message - From: Mark Kane [EMAIL PROTECTED] To: freebsd-questions@freebsd.org Sent: Tuesday, December 19, 2006 8:16 PM Subject: SCSI Tape Drive Problems Hi everyone. I'm experiencing some problems with two tape drives attached to this machine. Here is the situation: I first tried backing up 17GB of data using cpio to a six tape DDS-4 autoloader with a fresh 20GB/40GB Fuji tape. It stopped writing after about 9GB and gave the following error message on the command line, but didn't output anything to /var/log/messages: Internal overflow, aborting If I try to use tar instead of cpio and backup the same 17GB directory to the same 20GB native tape, it will give a tape full error way before completing. With that six tape autoloader, I have tried with two different brand new DDS-4 20/40 tapes, and the unit itself is brand new from the factory and has only written a few GB so far (mainly smaller files, which seemed to work fine). I then tried backing up the same 17GB directory to a Sun DLT 4000 single tape unit with a 20GB/40GB tape using cpio. It wrote about 250MB and then quit with a Found End of Volume error. It outputted a lot of errors to /var/log/messages which can be found here: http://tntpowerhost.com/mixx941/freebsd/sun_tape_errors_1.log I did another test on the same Sun DLT 4000 with a smaller 1.5GB directory and a different tape. This time it wrote about 550MB and then gave the same Found End of Volume message as before. This time there were even more errors in /var/log/messages: http://tntpowerhost.com/mixx941/freebsd/sun_tape_errors_2.log I also tested with the smaller 1.5GB directory to the DDS-4 autoloader, however that did complete without error. At this point I was running 6.2-PRERELEASE #18: Wed Nov 15 11:12:09 from last month, so today I cvsupped to RELENG_6 and rebuilt. Trying the same 1.5GB directory using the Sun DLT 4000 after the update resulted in it writing about 200MB of data and then stopping with the Found end of volume message again, as well as errors in /var/log/messages (however not as many this time): http://tntpowerhost.com/mixx941/freebsd/sun_tape_errors_3.log Any suggestions on what to check or any ideas on how to proceed would be great. I don't think it's both tape drives failing or bad tapes because pretty much the same thing happens with two different drives (one of which is completely new), and four different tapes (two of those completely new). I suppose it could be a problem with the SCSI controller (Adaptec 2940U2W), but I'd like to rule out any software issues before having to buy any additional hardware. Thanks very much in advance. -Mark Dmesg: http://tntpowerhost.com/mixx941/freebsd/dmesg.121906 -- Internet Radio: Party107 (Trance/Electronic) - http://www.party107.com Rock 101.9 The Edge (Rock) - http://www.rock1019.net IRC: MIXXnet IRC Network - irc.mixxnet.net (Nick: MIXX941) ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED] ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
