— by Will Andrews 19 August 2002 <\/p>\n
The Story<\/p>\n
I needed more disk space on my vinum volume, which I created about 18 months ago using 2 IBM DeskStar 30GXP 30GB ATA100 drives. Originally, I created a RAID 0 (stripe) filesystem on top of these drives using vinum. But now I needed more disk space for various processes that I was running on the machine. So I got a new IBM DeskStar 80GB ATA100 drive.<\/p>\n
Just like the FreeBSD diary article on vinum, I had an \/etc\/vinum.conf. Its contents were:<\/p>\n
The result was a ~55GB vinum volume. Starting with FreeBSD 4.4, a new command, called growfs(8), was introduced which allows one to grow (but not shrink) a filesystem. It was particularly designed to work with vinum, but also works on normal filesystems.<\/p>\n The problem and the solution<\/p>\n Not being exactly sure how to format the new disk, I visited the FreeBSD documentation link suggested by the Diary's vinum page and read the details on how to create a “dangerously dedicated” (the original drives on the plex were sliced by sysinstall) disk. Once that was done, all I had to do was change \/etc\/vinum.conf to this:<\/p>\n Then I rebooted the system to single user mode, and did this:<\/p>\n # vinum create -f \/etc\/vinum.conf # growfs \/dev\/vinum\/firepipe<\/coolcode><\/p>\n Growfs(8) will ask whether the filesystem is backed up.<\/p>\n NOTE: Backing up the filesystem is HIGHLY recommended. I did this *BEFORE* touching the new drive or the RAID filesystem.<\/p>\n Growfs(8) will then proceed to extend the filesystem and it will give an output similar to newfs(8), in that it prints the locations of the superblocks. Note, however, that these are *new* superblocks on the filesystem, as they are being placed on the *new* drive. Once this process finishes, the system should be able to mount the filesystem with the additional disk space. <\/p>\n","protected":false},"excerpt":{"rendered":"
drive drive2 device \/dev\/ad6s1e
volume firepipe
plex org concat
sd length 29314m drive drive1
sd length 29314m drive drive2<\/coolcode><\/p>\n
drive drive2 device \/dev\/ad6s1e
drive drive3 device \/dev\/ad0e
volume firepipe
plex org concat
sd length 29314m drive drive1
sd length 29314m drive drive2
sd length 78355m drive drive3<\/coolcode><\/p>\n
Type 'NO FUTURE' as is necessary. This will destroy the previous
configuration on the vinum volume.<\/p>\n
[..some vinum output..]<\/p>\n