Not able to mount UFS disk

[mmc]

Hi all,

I've got a 2TB disk formatted in UFS, no RAID, last Nas4free version; after a power failure in the mount point it says there is an error-retry note. I retry but nothing happens.
The disk under management is correctly installed, apparently it cannot be mounted.
If I try to remount it again from scratch, it says that there are some input errors:

Tipo di partizione o numero di partizione errato.
/dev/ada4p1: Impossibile ottenere UFS ID
dumpfs: /dev/ada4p1: could not find special device

Roughly tranlsated from Italian:

Wrong type of partition or number of partition
/dev/ada4p1: can't get UFS ID
dumpfs: /dev/ada4p1: could not find special device


I also tryed an fdisk and this is the output:

# fdisk /dev/ada4
******* Working on device /dev/ada4 *******
parameters extracted from in-core disklabel are:
cylinders=3876021 heads=16 sectors/track=63 (1008 blks/cyl)

Figures below won't work with BIOS for partitions not in cyl 1
parameters to be used for BIOS calculations are:
cylinders=3876021 heads=16 sectors/track=63 (1008 blks/cyl)

fdisk: invalid fdisk partition table found
Media sector size is 512
Warning: BIOS sector numbering starts with sector 1
Information from DOS bootblock is:

The data for partition 1 is:
sysid 165 (0xa5),(FreeBSD/NetBSD/386BSD)
start 63, size 3907029105 (1907729 Meg), flag 80 (active)
beg: cyl 0/ head 1/ sector 1;
end: cyl 180/ head 15/ sector 63
The data for partition 2 is:
UNUSED
The data for partition 3 is:
UNUSED
The data for partition 4 is:
UNUSED


I should have a backup of the disk, but of course I would prefer to avoid to re-format the disk (not even sure this can solve the problem), even because the last time I couldn't mount the 2TB external hard disk (I can't remember now the error, it was something related with unsupported big disk capacity).

Thank you for your help.

[shakky4711]

Hello,

initiate a filesystem check on the partition, FAQ0001
http://wiki.nas4free.org/doku.php?id=faq:0001

I strongly recommend to consider to use an UPS in future, most posts with data loss start with "after a power failure..."


Good luck
Shakky

[mmc]

Thank you very much! You know what, I made a double mistake: the UPS was there, but I hadn't checked it recently and the charge of the battery was too low. Anyway, I learn a new thing!

I'll try the procedures as soon as I can.
Thank you again.

[Fluffiator]

Thank you Shakky4711! Still helping people over a year later