Thread View: comp.unix.large
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Started by John K Scoggin
Sat, 21 Nov 1992 14:39
Suggestions for backing up LARGE disks?
Author: John K Scoggin
Date: Sat, 21 Nov 1992 14:39
Date: Sat, 21 Nov 1992 14:39
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We are looking for a high-speed alternative to Exabyte 8mm drives for backup. Ideally, a tape system with stacker having a capacity of 5GB/tape (minimum) and a higher transfer rate (1-2 MB/minute would be nice). BTW, we are using ReelBackup as our backup system, currently. SCSI or SCSI-2 interface is a must. The hardware environment is Sun SPARC. Thanks for any pointers... - John ------------------------------------------------------------------------- John K. Scoggin, Jr. Email: scoggin@udel.edu Supervisor, Network Operations scoggin@delmarva.com Delmarva Power & Light Co. Voice: 302-451-5200 P.O. Box 6066 Fax: 302-451-5321 Newark, DE 19714-6066 ------------------------------------------------------------------------- Your milage may vary. Void where prohibited by law (or common sense).
Re: Suggestions for backing up LARGE disks?
Author: Peter Van Epp
Date: Sun, 22 Nov 1992 06:22
Date: Sun, 22 Nov 1992 06:22
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scoggin@snow-white.ee.udel.edu (John K Scoggin) writes: >We are looking for a high-speed alternative to Exabyte 8mm drives for backup. >Ideally, a tape system with stacker having a capacity of 5GB/tape (minimum) >and a higher transfer rate (1-2 MB/minute would be nice). BTW, we are using >ReelBackup as our backup system, currently. SCSI or SCSI-2 interface is a >must. The hardware environment is Sun SPARC. >Thanks for any pointers... > - John >------------------------------------------------------------------------- >John K. Scoggin, Jr. Email: scoggin@udel.edu >Supervisor, Network Operations scoggin@delmarva.com >Delmarva Power & Light Co. Voice: 302-451-5200 >P.O. Box 6066 Fax: 302-451-5321 >Newark, DE 19714-6066 >------------------------------------------------------------------------- >Your milage may vary. Void where prohibited by law (or common sense). A couple of months spent trying to make a SCSI 3480 stream on a variety of Suns indicates to me that memory bandwidth in the Sun is going to be your limiting factor. It didn't appear to be able to keep a 3480 streaming, and the drive manufacturer suggested that the Sun file system was the bottleneck. It isn't the drives, because they do stream on a VAX 6000 series machine running VMS (via a BI bus to SCSI converter). I was using SparcStation1 and SparcStation2 class machines, the Sparc10s or the 670 or 690 servers may be a different story (but I don't have either, nor the 3480 any more). Peter Van Epp / Operations and Technical Support Simon Fraser University, Burnaby, B.C. Canada
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