Bug #1586

Updated by tuxillo 5 months ago

If a partition contains a hammer fs and you newfs it to a UFS you can

afterwards still mount it as hammer fs.

You can even still run hammer info and write data on the partition

(tried with dd).

Redo the following:

atom# newfs_hammer -L pgsql /dev/ad11s2d

Volume 0 DEVICE /dev/ad11s2d size 146.48GB

initialize freemap volume 0


1 volume total size 146.48GB version 2

boot-area-size: 64.00MB

memory-log-size: 0.50GB

undo-buffer-size: 152.00MB

total-pre-allocated: 168.00MB

fsid: 98d1b558-c09e-11de-81f0-0122685cfb53

NOTE: Please remember that you may have to manually set up a

cron(8) job to prune and reblock the filesystem regularly.

By default, the system automatically runs 'hammer cleanup'

on a nightly basis. The periodic.conf(5) variable

'daily_clean_hammer_enable' can be unset to disable this.

Also see 'man hammer' and 'man HAMMER' for more information.

atom# newfs /dev/ad11s2d

/dev/ad11s2d: media size 149993.15MB

Warning: Block size and bytes per inode restrict cylinders per group to 89.

Warning: 1748 sector(s) in last cylinder unallocated

/dev/ad11s2d: 307185964 sectors in 74997 cylinders of 1 tracks, 4096 sectors

149993.1MB in 843 cyl groups (89 c/g, 178.00MB/g, 22528 i/g)

super-block backups (for fsck -b #) at:

32, 364576, 729120, 1093664, 1458208, 1822752, 2187296, 2551840,

2916384, 3280928, 3645472, 4010016, 4374560, 4739104, 5103648, 5468192,

5832736, 6197280, [...]

atom# mount_hammer /dev/ad11s2d /mnt

atom# mount

ROOT on / (hammer, local)

devfs on /dev (devfs, local)

/dev/serno/9SF12T4Y.s2a on /boot (ufs, local)

/pfs/@@-1:00001 on /var (null, local)

/pfs/@@-1:00002 on /tmp (null, local)

/pfs/@@-1:00003 on /usr (null, local)

/pfs/@@-1:00004 on /home (null, local)

/pfs/@@-1:00005 on /usr/obj (null, local)

/pfs/@@-1:00006 on /var/crash (null, local)

/pfs/@@-1:00007 on /var/tmp (null, local)

procfs on /proc (procfs, local)

pgsql on /mnt (hammer, local)