Re: Problem with tape drive: illegal seek
Thanks to you both! Indeed, "dd" works when bs=10k, and tar works as long as you don't try to auto-compare it. I'll look into using --compare instead, thanks. I wonder if this is a bug or feature in tar? Should I report it? -- Regards, Christian Iversen - To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: Problem with tape drive: illegal seek
On Sat, 26 Feb 2005, Christian Iversen wrote: > > Whenever I use --verify for tar, I get problems. Specifically, I get > "Illegal seek" when tar gets to the verify phase. > I looked at tar 1.13.25 sources and this looks like a tar bug: verify from tape does not work for the first file (and I am not sure about other files). After writing, tar tries to skip backwards over two filemarks. When writing the first file, there is no second filemark to skip over: this fails and gives you the error. If you do verify with a second call to tar (tar --compare) after skipping backwards with mt, this should work. ... > Please note that I can restore the data just fine, if I use tar. If I try to > use dd, I get strange errors as well: > > [EMAIL PROTECTED]/tmp #dd if=/dev/tape of=dump > dd: reading `/dev/tape': Cannot allocate memory > 0+0 records in > 0+0 records out > 0 bytes transferred in 3,699040 seconds (0 bytes/sec) > Guy already solved this problem. The message (Cannot allocate memory) is not very clear but this is what other Unices use. -- Kai - To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html
RE: Problem with tape drive: illegal seek
Your dd issue may be related to block size. Tar defaults to 10k blocks, dd defaults to 512 bytes blocks. Try this dd command: dd if=/dev/tape of=dump bs=10k No idea about the verify. Guy -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Christian Iversen Sent: Friday, February 25, 2005 6:16 PM To: linux-scsi Subject: Problem with tape drive: illegal seek Whenever I use --verify for tar, I get problems. Specifically, I get "Illegal seek" when tar gets to the verify phase. I'm trying this on a Compaq SDT-1 on an Adaptec AHA-3940U2x/395U2x, according to lspci. The following simulates my backup script.. to some extend :) [EMAIL PROTECTED]/tmp #dd if=/dev/urandom of=random-data bs=1024 count=1024 1024+0 records in 1024+0 records out 1048576 bytes transferred in 0,324788 seconds (3228493 bytes/sec) [EMAIL PROTECTED]/tmp #mt rewind [EMAIL PROTECTED]/tmp #tar --create --verify --file /dev/tape random-data tar: /dev/tape: Warning: Cannot seek: Illegal seek [EMAIL PROTECTED]/tmp #dmesg | tail program smartd is using a deprecated SCSI ioctl, please convert it to SG_IO program smartd is using a deprecated SCSI ioctl, please convert it to SG_IO program smartd is using a deprecated SCSI ioctl, please convert it to SG_IO program smartd is using a deprecated SCSI ioctl, please convert it to SG_IO program smartd is using a deprecated SCSI ioctl, please convert it to SG_IO program smartd is using a deprecated SCSI ioctl, please convert it to SG_IO program smartd is using a deprecated SCSI ioctl, please convert it to SG_IO program smartd is using a deprecated SCSI ioctl, please convert it to SG_IO program smartd is using a deprecated SCSI ioctl, please convert it to SG_IO ReiserFS: md0: warning: vs-8115: get_num_ver: not directory item [EMAIL PROTECTED]/tmp # Should I look into the buggy'dness of this, or am I doing something wrong? Please note that I can restore the data just fine, if I use tar. If I try to use dd, I get strange errors as well: [EMAIL PROTECTED]/tmp #dd if=/dev/tape of=dump dd: reading `/dev/tape': Cannot allocate memory 0+0 records in 0+0 records out 0 bytes transferred in 3,699040 seconds (0 bytes/sec) I hope you can help me. -- Regards, Christian Iversen - To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html - To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html
Problem with tape drive: illegal seek
Whenever I use --verify for tar, I get problems. Specifically, I get "Illegal seek" when tar gets to the verify phase. I'm trying this on a Compaq SDT-1 on an Adaptec AHA-3940U2x/395U2x, according to lspci. The following simulates my backup script.. to some extend :) [EMAIL PROTECTED]/tmp #dd if=/dev/urandom of=random-data bs=1024 count=1024 1024+0 records in 1024+0 records out 1048576 bytes transferred in 0,324788 seconds (3228493 bytes/sec) [EMAIL PROTECTED]/tmp #mt rewind [EMAIL PROTECTED]/tmp #tar --create --verify --file /dev/tape random-data tar: /dev/tape: Warning: Cannot seek: Illegal seek [EMAIL PROTECTED]/tmp #dmesg | tail program smartd is using a deprecated SCSI ioctl, please convert it to SG_IO program smartd is using a deprecated SCSI ioctl, please convert it to SG_IO program smartd is using a deprecated SCSI ioctl, please convert it to SG_IO program smartd is using a deprecated SCSI ioctl, please convert it to SG_IO program smartd is using a deprecated SCSI ioctl, please convert it to SG_IO program smartd is using a deprecated SCSI ioctl, please convert it to SG_IO program smartd is using a deprecated SCSI ioctl, please convert it to SG_IO program smartd is using a deprecated SCSI ioctl, please convert it to SG_IO program smartd is using a deprecated SCSI ioctl, please convert it to SG_IO ReiserFS: md0: warning: vs-8115: get_num_ver: not directory item [EMAIL PROTECTED]/tmp # Should I look into the buggy'dness of this, or am I doing something wrong? Please note that I can restore the data just fine, if I use tar. If I try to use dd, I get strange errors as well: [EMAIL PROTECTED]/tmp #dd if=/dev/tape of=dump dd: reading `/dev/tape': Cannot allocate memory 0+0 records in 0+0 records out 0 bytes transferred in 3,699040 seconds (0 bytes/sec) I hope you can help me. -- Regards, Christian Iversen - To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html
