RAMdisks, creating under FreeBSD 5.x
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| − | I invariably get irritated and confused by [[mdconfig]]'s syntax, since I need it just often enough to never remember how to use it, and no more. And most of the readily google-able documentation on the web covers FreeBSD 4.x's [[vnconfig]] instead, which is useless if you're running a 5.x system. So I just wrote myself a handy little shell script that I keep in my home directory for reference's sake: | + | I invariably get irritated and confused by [[mdconfig]]'s syntax, since I need it just often enough to never remember how to use it, and no more. And most of the readily google-able documentation on the web covers FreeBSD 4.x's [[vnconfig]] instead, which is useless if you're running a 5.x system. So I just wrote myself a handy little shell script named '''makeramdisk.sh''' that I keep in my home directory for reference's sake: |
| − | |||
#!/bin/sh | #!/bin/sh | ||
| Line 9: | Line 8: | ||
/sbin/newfs -U /dev/md10 | /sbin/newfs -U /dev/md10 | ||
/sbin/mount /dev/md10 /mnt/ramdisk | /sbin/mount /dev/md10 /mnt/ramdisk | ||
| + | echo "256MB ramdisk created on /dev/md10 and mounted on /mnt/ramdisk" | ||
| + | exit 0 | ||
| + | ;; | ||
| + | stop) | ||
| + | /sbin/umount /mnt/ramdisk | ||
| + | /sbin/mdconfig -d -u 10 | ||
| + | echo "ramdisk unmounted from /mnt/ramdisk and deleted from /dev/md10" | ||
| + | ;; | ||
| + | *) | ||
| + | echo "Usage: `basename $0` {start|stop}" >&2 | ||
| + | exit 64 | ||
| + | ;; | ||
| + | esac | ||
| + | |||
| + | Under FreeBSD 6.x (and possibly under 5.x as well), the first three lines of the start section can be combined into a single line, as per the below. | ||
| + | |||
| + | #!/bin/sh | ||
| + | |||
| + | case "$1" in | ||
| + | start) | ||
| + | /sbin/mdmfs -s 256M md10 /mnt/ramdisk | ||
echo "256MB ramdisk created on /dev/md10 and mounted on /mnt/ramdisk" | echo "256MB ramdisk created on /dev/md10 and mounted on /mnt/ramdisk" | ||
exit 0 | exit 0 | ||
| Line 26: | Line 46: | ||
You should be able to figure out from the examples what you'd need to do different to change the size of the drive, where you mount it, etc. | You should be able to figure out from the examples what you'd need to do different to change the size of the drive, where you mount it, etc. | ||
| + | [[Category : Common Tasks]] | ||
Latest revision as of 00:37, 6 October 2012
I invariably get irritated and confused by mdconfig's syntax, since I need it just often enough to never remember how to use it, and no more. And most of the readily google-able documentation on the web covers FreeBSD 4.x's vnconfig instead, which is useless if you're running a 5.x system. So I just wrote myself a handy little shell script named makeramdisk.sh that I keep in my home directory for reference's sake:
#!/bin/sh
case "$1" in
start)
/sbin/mdconfig -a -t malloc -s 256M -u 10
/sbin/newfs -U /dev/md10
/sbin/mount /dev/md10 /mnt/ramdisk
echo "256MB ramdisk created on /dev/md10 and mounted on /mnt/ramdisk"
exit 0
;;
stop)
/sbin/umount /mnt/ramdisk
/sbin/mdconfig -d -u 10
echo "ramdisk unmounted from /mnt/ramdisk and deleted from /dev/md10"
;;
*)
echo "Usage: `basename $0` {start|stop}" >&2
exit 64
;;
esac
Under FreeBSD 6.x (and possibly under 5.x as well), the first three lines of the start section can be combined into a single line, as per the below.
#!/bin/sh
case "$1" in
start)
/sbin/mdmfs -s 256M md10 /mnt/ramdisk
echo "256MB ramdisk created on /dev/md10 and mounted on /mnt/ramdisk"
exit 0
;;
stop)
/sbin/umount /mnt/ramdisk
/sbin/mdconfig -d -u 10
echo "ramdisk unmounted from /mnt/ramdisk and deleted from /dev/md10"
;;
*)
echo "Usage: `basename $0` {start|stop}" >&2
exit 64
;;
esac
To use this script, you would type makeramdisk.sh start or makeramdisk.sh stop to create and mount, or dismount and delete, respectively, a 256MB RAMdisk on /dev/md10. (Note: the script as written depends on the prior existence of a directory at /mnt/ramdisk. If that directory does not exist, you're going to have problems.)
You should be able to figure out from the examples what you'd need to do different to change the size of the drive, where you mount it, etc.
