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тАО10-12-2009 03:29 AM
тАО10-12-2009 03:29 AM
I'm trying, using a HP C5683A Surestore DAT40 to create backups on new media of type DDS-4 using commandline utility mt and tar. When I try to tar to the drive it fail with and write fail, I/O error. When I try to erase the tape it shows me a fatal error. When I perform both steps on a DDS-2 tape all is OK. I also ran the ltt utility on the drive, this shows a similar issue, DDS-2 succeeds, DDS-4 fails.
Do I need to write settings to the drive or add options to the utilities to be able to use DDS-4 tapes?
My configuration is an Adaptec 2940U2W controller connected to the HP C5683A Surestore DAT40 on a CentOS 5.3 linux system.
Solved! Go to Solution.
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тАО10-12-2009 03:40 AM
тАО10-12-2009 03:40 AM
Re: HP C5683A Surestore DAT40, backup to DDS-2 works, DDS-4 gives I/O error
it seems to me an HW issue of DDS-4, no operating system problem. Have you checked that aspect?
Best regards,
Fabio
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тАО10-12-2009 03:49 AM
тАО10-12-2009 03:49 AM
Re: HP C5683A Surestore DAT40, backup to DDS-2 works, DDS-4 gives I/O error
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тАО10-12-2009 04:30 AM
тАО10-12-2009 04:30 AM
Re: HP C5683A Surestore DAT40, backup to DDS-2 works, DDS-4 gives I/O error
Apparently you have a bottleneck with Media and System:
Is it first time to backup with DDS-4 ?
if so,
-check and be sure somehow your SCSI bus supports it ?
-And besides, maybe problem is media DDS-4 Tape itself ? did you change and try with new one ?
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тАО10-12-2009 05:04 AM
тАО10-12-2009 05:04 AM
Re: HP C5683A Surestore DAT40, backup to DDS-2 works, DDS-4 gives I/O error
I use an adaptec 2940U2W scsi adapter which supports 2 scsi 68pin connections, on is for ultra2 and the other is wide ultra. The drive is connected to the wide ultra interface, which is, I believe the interface that is used by the drive and I use a cable that is terminated at the drives end. The system, by the way, is a P4 2.4GHz PC with 2GB memory. I figured that if backups succeed on DDS-2, DDS-4 should work too ?
PS. This is the first time I'm running a backup using DDS-4 tapes. I tried several all new ones. My old DDS-2 tapes, run flawlessly.
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тАО10-12-2009 11:48 AM
тАО10-12-2009 11:48 AM
Re: HP C5683A Surestore DAT40, backup to DDS-2 works, DDS-4 gives I/O error
I checked internet , I do not remember where I met this article but:
->>
since mixing fast Ultra2 SCSI devices with slower Ultra SCSI ones would cause problems, usually resulting in all bus traffic running at the speed of the slowest device.
->>
did you try backup with ultra wide scsi connected to DAT40 while all scsi slots empty
to get rid of above problem ?
And did you try another brand of DDS-4 media?
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тАО10-13-2009 06:52 AM
тАО10-13-2009 06:52 AM
Re: HP C5683A Surestore DAT40, backup to DDS-2 works, DDS-4 gives I/O error
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тАО10-15-2009 04:50 AM
тАО10-15-2009 04:50 AM
Re: HP C5683A Surestore DAT40, backup to DDS-2 works, DDS-4 gives I/O error
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тАО10-16-2009 04:29 AM
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тАО10-20-2009 04:19 AM
тАО10-20-2009 04:19 AM
Re: HP C5683A Surestore DAT40, backup to DDS-2 works, DDS-4 gives I/O error
Here's the report I get from the hp_ltt utility program. I did perform a clean drive 5 times in a row as inidcated without any success, it still reports that I need to clean the drive ? I cannot figure why it won't use my DDS-4 type tapes. I have tried both Sony and Imation tapes new and old.