Date: Mon, 5 Oct 1998 09:55:03 -0700 From: "Derek Seaman" <dseaman@spawar.navy.mil> To: <aic7xxx@FreeBSD.ORG> Subject: DAT tape block sizes Message-ID: <000001bdf080$e5d53fc0$33be3180@dseaman.spawar.navy.mil>
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This isn't an AIC7xxx specific question, though my Linux machines are using the AIC driver. Our department produces Sybase 11 database tapes (4mm DATS) which use variable block size records. Trying to copy them with dd doesn't work since dd expects fixed record lengths. What I need to do is read the tape to the HD, and then write it back out to another tape, while preserving the correct (and varying) block sizes. If that fails, a direct tape to tape copy would be acceptable. Is there any scsi tape program, besides dd, which will correctly handle such tapes? Also, I need a way to find out a 4mm DAT currently in the drive was written with compression turned on or off. Note, I don't mean the current status of the compression flag. I mean whether the data previously written on the tape is compressed or not. The 'mt' status command does not reflect what was written on the tape, but rather the current tape compression flag. Thanks for any input! Derek L. Seaman, Engineer Tactical Cryptologic Systems, D7213 SPAWAR System Center, San Diego dseaman@spawar.navy.mil Ph: (619) 553-6795 Fx: (619) 553-1133 To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-aic7xxx" in the body of the message
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