* Marty Shannon, RHCE ([EMAIL PROTECTED]) [20020119 13:00] thus spake:
> The proper mechanism for this is obtained by "man stinit" under recent
> versions of Linux; Solaris has an analogous mechanism. Other systems
> probably also have it, but I don't know for sure. To use hardware
> compression, just refer to the device name that has the compression
> enabled.
>
> For instance, on my tape server, my /etc/stinit.def looks like:
>
> # The common definitions that can usually be used
> {buffer-writes read-ahead async-writes }
>
> # Seagate AIT
> manufacturer=SEAGATE model="AIT" {
> can-bsr can-partitions scsi2logical auto-lock
> mode1 blocksize=0 density=0x30 compression=0 # native, no compression
> mode2 blocksize=0 density=0x30 compression=1 # native, w/ compression
> }
and for completeness, here my stinit.def (Linux RH-7.1) for
my 4mm DAT Python :
# A compressing DAT
manufacturer=ARCHIVE model = "Python 00095-001" {
scsi2logical=1 can-bsr can-partitions auto-lock
mode1 blocksize=0 compression=0 density=0x24
mode2 blocksize=1024 compression=0 density=0x24
mode3 blocksize=0 compression=0 density=0x13
mode4 blocksize=1024 compression=0 density=0x13 }
#
and the corresponding tape devices:
crw-rw---- 1 root disk 9, 128 Mar 23 2001 /dev/nst0
crw-rw---- 1 root disk 9, 224 Mar 23 2001 /dev/nst0a
crw-rw---- 1 root disk 9, 160 Mar 23 2001 /dev/nst0l
crw-rw---- 1 root disk 9, 192 Mar 23 2001 /dev/nst0m
crw-rw---- 1 root disk 9, 0 Mar 23 2001 /dev/st0
crw-rw---- 1 root disk 9, 96 Mar 23 2001 /dev/st0a
crw-rw---- 1 root disk 9, 32 Mar 23 2001 /dev/st0l
crw-rw---- 1 root disk 9, 64 Mar 23 2001 /dev/st0m
Then just sticks the following line in modules.conf:
post-install st /sbin/stinit
HTH,
jf
>
> Under Linux, you will almost certainly need to use "mknod" to create
> appropriate devices; mine (on a SCSI interface) look like:
>
> crw-rw-rw- 1 root disk 9, 128 May 5 1998 /dev/nst0
> crw-rw-rw- 1 root root 9, 160 Dec 11 1999 /dev/nst0c
> crw-rw-rw- 1 root disk 9, 0 May 5 1998 /dev/st0
> crw-rw-rw- 1 root root 9, 32 Dec 11 1999 /dev/st0c
>
> (Actual backups are done on a different machine & drive; these are for
> illustration only.)
>
> Cheers,
> Marty
> --
> Marty Shannon, RHCE, Independent Computing Consultant
> mailto:[EMAIL PROTECTED]
--
They bring smooth comforts false, worse than true wrongs.
