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AUX info
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1990-04-16
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Some hints: If you want to boot A/UX from the cartridge don't forget to make
a swap partition on it and set the kernel value SWAPCNT to the size of the
partition. Don't make eschatology partitions - they are for backup and you
don't need to backup the backup disk. A good way of copying files to the
syquest is to mount it as /syquest and do
find /dir -depth -print | cpio -puldma /syquest
which will create /syquest/dir and copy over /dir and all subdirectories to
the cartridge. Next time you do it, leave out the u in puldma and only files
that have changed since the last copy will be copied. Great. This method will
also copy over the files in /dev.
More hints: You don't need to partition each cartridge. Just format it, make
sure block 0 is blank (use dd to check or to clear it) use pname to recognize
slice 31 and you can use it as c?d?s31. It won't work under MacOS of course.
To be able to boot from a cartridge you will need a small MacOS partition,
and root and swap partitions.
If your formatting software does not let you create A/UX partitions then you
will have to do them under A/UX using dp. You can also format the cartridge
under A/UX using the diskformat command and size 512. I suggest making a
script to use dp so that you can do more than one cartridge quickly. An
example might be something like:
dp /dev/rdsk/c4d0s31 << EOF
I7
a1 8 86662 SyQuest y 0 86662 0 1 y y
wq
EOF
Make sure you always unmount the disk before removing it. Else you lose data.
The SCSI disk driver should be modified so that the cartridge can only be
removed when a umount is done. This is a simple modification and I'll do it
someday when I figure out how to modify the A/UX generic disk driver to
include my SyQuest routines in place of the sd routines.
Remember to do a fsck on the device before you mount it each time. It's easy
to forget since it is not done automatically (unless you put the drive into
/etc/fstab). The consequences of using a disk that has not been fsck'ed can
be serious if there are filesystem errors on the disk that fsck could have
fixed. (Eg these errors can occur if the Mac crashes or you forget to unmount
the disk before removing it).