Mount: /dev/da0: Operation not permitted

Chris Kelley mail at
Mon Jun 30 17:42:45 UTC 2014


I’m trying to get a USB RAID 1+0 formatted as UFS to mount after a power outage and auto-restart.
mount(8) errors with “Operation not permitted”. I’ve tried the following:

# mount -t ufs /dev/da0 /mnt/vault
mount: /dev/da0: Operation not permitted

# dmesg | grep da0
da0 at umass-sim0 bus 0 scbus2 target 0 lun 0
da0: <JMicron H/W RAID10 > Fixed Direct Access SCSI-2 device 
da0: Serial Number AD01EA0D91FF
da0: 40.000MB/s transfers
da0: 1907648MB (3906863104 512 byte sectors: 255H 63S/T 243190C)
da0: quirks=0x2<NO_6_BYTE>

# fsck -t ufs -fy /dev/da0
** /dev/da0
** Last Mounted on /mnt/vault
** Phase 1 - Check Blocks and Sizes
** Phase 2 - Check Pathnames
** Phase 3 - Check Connectivity
** Phase 4 - Check Reference Counts
** Phase 5 - Check Cyl groups
1148248 files, 21336627 used, 451688721 free (39393 frags, 56456166 blocks, 0.0% fragmentation)


There doesn’t seem to be any error or message in /var/log/messages or /var/log/all.log. I’m not quite sure how to handle this.


-------------- next part --------------
A non-text attachment was scrubbed...
Name: smime.p7s
Type: application/pkcs7-signature
Size: 4203 bytes
Desc: not available
URL: <>

More information about the freebsd-questions mailing list