Most USB keys will setup SCSI drive device (in my case it was /dev/sda1). Plug in a USB key and check out the /var/log/messages file to see what device was created.
You'll want to get a little program installed on your system called 'scsiadd'. This allows you to remove USB scsi devices from the system without causing them damage. It's available here: http://llg.cubic.org/tools/
The following assumes you are logged into the system as root...
Add required packages:
yum install lsscsi
If you don't have development tools on your sipXecs system yet, add them:
yum install gcc gcc-c++ kernel-devel
Download, build and install scsiadd:
cd $HOME
mkdir scsiadd
cd scsiadd
wget http://llg.cubic.org/tools/scsiadd-1.97.tar.gz
tar -xf scsiadd-1.97.tar.gz
cd scsiadd-1.97
./configure
make install
Command line options:
scsiadd 1.97 - add and remove devices from the scsi subsystem
---------------------------------------------------------------
syntax: scsiadd {-a|-r}
scsiadd {-a|-r}
scsiadd {-a|-r}
scsiadd {-a|-r}
scsiadd [-i maxid] -s
scsiadd [-i maxid] -s
scsiadd -p
parameters not given are assumed 0
-a: add a device (default if no command given)
-r: remove device
-s: scan for devices
-p: print scsi status
-h: print this help message
-i: maximum SCSI ID which is scanned
Here's a good blog article on using scsiadd: http://blog.shadypixel.com/safely-removing-external-drives-in-linux/
Essentially, to remove a scsi device while the system is running, first find the device with lsscsi and then use scsiadd -r to remove it...
[root@sipx scsiadd-1.97]# lsscsi
[3:0:0:0] disk CBM USB 2.0 5.00 /dev/sdb
[root@sipx scsiadd-1.97]# scsiadd -r 3
could not remove device 0 0 3 0 : No such device or address
[root@sipx scsiadd-1.97]# scsiadd -r 3 0 0 0
[root@sipx scsiadd-1.97]#
Ok, now let's get to making the USB work:
Convert your USB drive from FAT16 or whatever it is to ext3:
mkfs.ext3 /dev/sda1
Modify /etc/fstab:
nano -w /etc/fstab
Add the following line at the bottom:
/dev/sda1 /var/sipxdata/backup vfat auto,user,rw,sync 0 0
Test your fstab file now:
mount -a
And check to see that it is mounted:
mount
Change ownership on backup folder:
chown -R sipxchange:sipxchange /var/sipxdata/backup
Perform a test backup from the GUI.
4 comments:
Need to change /dev/sda1 to /dev/sda.
also, change mount command.
after mount command, chown sipxchange:sipxchange /var/sipxdata/backup
change vfat to ext3
Mike, seems to work fine. I just used ext3 in the fstab. the device name can be different... mine was /dev/sdb
just check often using lsscsi to make sure...
thanks!
Mike, I thought I'd post a variation on your entry so that it makes a *copy* of the contents of the backup directory rather than replaces it. I figure two copies of a backup file are better than one, especially if they are on different media.... (FYI, I am certainly no Linux master, but this seems to work)
insert a USB stick, I used an 8G
notice what device it is by watching the console.
if you don’t notice use:
lsscsi
to find out. Mine came in at /dev/sdb
make a new ext3 file system on the USB stick:
mkfs.ext3 /dev/sdb
cd /var/sipxdata
mkdir backup2
chown -R sipxchange:sipxchange backup2
(probably unnecessary as the copy will run as root)
cd /etc
nano -w fstab
add the following to the end of the file and save:
/dev/sdb /var/sipxdata/backup2 ext3 auto,user,rw,sync 0 0
now...
mount -a
mount (to check to see that it mounted /dev/sdb at backup2)
now create a cron job to copy backups from the normal backup location to the new...
cd /var/cron.daily
nano -w sipx-copybackup
and add these lines which do a copy/update to the backup2 location. (Note that perhaps should check space or delete things old or something...):
#!/bin/sh
# JCA script to copy backups (sync) to a mounted usb stick
cp -ru /var/sipxdata/backup/* /var/sipxdata/backup2
save the file
now make it executable:
chmod a+x sipx-copybackup
if you want to try it now:
./sipx-copybackup
this could take a while to run, but you should see the light on the USB stick blinking... It should run each night and copy anything new in the /var/sipxdata/backup directory to the USB stick.
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