-69846: Unrecognize...
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-69846: Unrecognized file system

New Member Customer

Just periodically checking all of my SoftRAID (mirrored) backup drive sets with Disk Utility to see if the filesystem and partition maps were ok.

Running Sierra, drives are in an external box connected by SAS.

All drives passed DU except one.

-69846: Unrecognized file system

DU didn't repair it.


macprolocal-3:/ admin$ diskutil repairDisk /dev/disk5
Repairing the partition map might erase disk5s1, proceed? (y/N) y
Started partition map repair on disk5
$Checking prerequisites
$Checking the partition list
$Adjusting partition map to fit whole disk as required
$Checking for an EFI system partition
$Checking the EFI system partition's size
$Checking the EFI system partition's file system
$Checking the EFI system partition's folder content
$Checking all HFS data partition loader spaces
$Checking booter partitions
$Checking booter partition disk5s5
$Updating boot support partitions for the volume as required
$Checking booter partition disk5s7
$Verifying file system
$Checking non-journaled HFS Plus Volume
$Checking extents overflow file
$Checking catalog file
$Checking multi-linked files
$Checking catalog hierarchy
$Checking extended attributes file
$Checking volume bitmap
$Checking volume information
$The volume Boot OSX appears to be OK
$File system check exit code is 0
$Problems were encountered during repair of the partition map
$Error: -69846: Unrecognized file system


macprolocal-3:/ admin$ sudo fdisk /dev/disk5
Disk: /dev/disk5 geometry: 243201/255/63 [3907029168 sectors]
Signature: 0xAA55
Starting Ending
#: id cyl hd sec - cyl hd sec [ start - size]
1: EE 1023 254 63 - 1023 254 63 [ 1 - 3907029167]
2: 00 0 0 0 - 0 0 0 [ 0 - 0] unused
3: 00 0 0 0 - 0 0 0 [ 0 - 0] unused
4: 00 0 0 0 - 0 0 0 [ 0 - 0] unused


What to do to fix it?

Topic starter Posted : 07/01/2018 7:29 pm
Member Admin

What to check is if SoftRAID sees a file system and link to the disks.

Disk Warrior is your best solution for repairing volumes.

Posted : 08/01/2018 12:13 pm
New Member Customer

Thanks for the reply.

Running DW5 doesn't cure the problem.

DU says to restart and use DU on the Recovery partition to fix it - not sure why since it's not in use as a start-up disk (although it does contain a system).

Will have to try that next.

SoftRAID sees and uses it no problem and with no complaints.

Topic starter Posted : 12/01/2018 10:06 pm