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Operating Systems AIX Slow listing of LTo5 tape contents Post 302803673 by m_raheelahmed on Tuesday 7th of May 2013 07:57:07 AM
Old 05-07-2013
IBM Slow listing of LTo5 tape contents

Hi,

We are taking our filesystem backup having size of 1.3 TB on LTO5 catridges using the following command

find * -print|backup -ivf '/dev/rmt0' '-U'

i.e backup byname and it took about 6.5 Hours to complete When we are listing same tape contents using the following command

restore -lTf '/dev/rmt0'

then it took almost the same time to list the contents in which backup was completed. Is there any way to fasten the tape content listing? Any help any idea would be highly appreciated.
Smilie
Thanks
 

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dds-dd(1)						      General Commands Manual							 dds-dd(1)

NAME
dds-dd - tool to read a dds device. SYNOPSIS
dds-dd [ -f device ] DESCRIPTION
dds-dd reads a dds tape devices (DAT). Every block is read and written to stdout. A tape with unknown block size or blocks of different size can be read. The default device is /dev/rmt0, which may be overridden with the environment variable TAPE, which in turn may be overridden with the -f device option. The device must be a character special file. OPTIONS
-f device Device of the tape archive (default is /dev/rmt0). Must be a character special file connected to a dds tape device. -V,--version Print the version number of mt-dds to stderr and exit immediately. --help print some screens of online help with examples through a pager and exit immediately. EXAMPLES
Example: Read the tape and make a listing: dds-dd | tar ft - Example: Read the tape and make a listing: dds-dd | cpio -it ENVIRONMENT
The environment variable TAPE overrides the default tape device /dev/rmt0. SEE ALSO dds2tar(1), dds2index(1), mt(1), tar(1) HISTORY
This program was created to use it in conjunction with dds2tar. AUTHOR
J"org Weule (weule@cs.uni-duesseldorf.de), Phone +49 211 751409. This software is available at ftp.uni-duesseldorf.de:/pub/unix/apollo 2.4 dds-dd(1)
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