Question about HP C7438A (Refurbished) DAT Tape Drive

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/dev/st0: Cannot open: Input/output error

I am using HP C7438A Tape drive to backingup my data. When i am moving the data to tape drive it giving me the following error.
/dev/st0: Cannot open: Input/output error

And also i am new to work with tape drives. Could you give the command to check whether the tape drive is detecting by OS. I am using redhatlinux.

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  • Anonymous Apr 10, 2008

    i m facing that my dat drive is not detected and gives error "no such device : /dev/st0

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  • 77 Answers

Just the fact that /dev/st0 exists indicates that the OS sees the tape drive. When you say you are "moving the data to tape drive" just how are you doing this? Have you read the dump man page?

Posted on Jan 28, 2008

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How to back up a Tape in Linux operating System


<p>Linux is a free operating system based on Linux kernel and provides a UNIX-like interface. Several Linux distributions including Ubuntu, Debian, Fedora, Pacman, RPM, Gentoo and Slackware. Linux is used in games consoles, mobile phones, netbooks and computers and mainframes and supercomputers. The Linux system can be through a Command Line Interface (CLI) or a graphical user interface (GUI) control. When you save data on your hard disk, a tape on Linux a few steps required to configure. <br /> <p><br /> <p>1. Open a terminal in Linux, and enter this code to data on multiple tapes: <br /> <p> <br /> <p>Tar clpMzvf / dev/st0 / home. " <br /> <p>2. Enter this code to the backups to compare: <br /> <p> <br /> <p>Tar dlpMzvf / dev/st0 / home. " <br /> <p>3. Restoring all backups missing hard disk with this code: <br /> <p> <br /> <p>Tar xlpMzvf / dev/st0 / home. " <br /> <p> <br /> <p>Now you have a tape backup done on Linux. <br />

on Jun 22, 2011 | Computers & Internet

1 Answer

Tar /dev/st0 can't write: error


Sounds like your tape drive or possibly the tape you are using is faulty.
check the following:
#1 - use a different tape
#2 - check that the read-only is not enabled on the tape(s)
#3 - run diagnostics on the drive (if it's come with software for diagnostics).
#4 - return it to the supplier to test and replace if under warranty.

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Several things might cause this.

1st off is that your drive will only compress if the backup software tells it to - so ensure your software is asking the drive to compress.

There is also a dip switch on the bottom of the drive that will disable compression - i think it it switch 3 on the underside of the drive on the main pcb

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Bit of an odd one but i agree that block size could cause an issue.

Try this link for the HP tech manual for this drive.

http://www.tag.com/tech%20support/System%20Resources/Drivers%20&%20Utilities/Drivers/Current/7.2/HP%20DAT%20Storage%20Works/guides/unix.pdf

It may help with your issue and does detail block size changes on some systems.

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