Today I rebooted my Gen2 My cloud. I was able to SSH into the device. Everything looked normal. I had plugged in a USB drive and was going to copy files off of the disk. But the disk was not mounted. So I went down stairs and found that the My Cloud had a red light. I unplugged the USB disk and the red light turned blue.
What I was trying to do was attach a 6TB disk that came out of a gen1 My Cloud that had disk problems. The disk can be mounted on a Linux system with out problems. Most of the files can be accessed. Checking the drive for errors shows that there are about 128 blocks that can’t be read. Since I have about 1TB of video on the disk I thought I could mount it on the new My Cloud and copy what files I could. Listed below is the dmesg output showing the problems trying to mount the disk. Why it is trying to mount as FAT? The disk had 8 partitions. But only /dev/sdb was created. I know that it only seems to mount the first partition.
[ 34.822602] FAT-fs (sdb): bogus number of reserved sectors
[ 34.826809] FAT-fs (sdb): Can’t find a valid FAT filesystem
[ 34.833379] ufsd: failed to mount “sdb”
[ 34.835933] ufsd:default nls iso8859-1
[ 34.838444] ufsd:fill_super(“sdb”), 22440: dc928140 10000000, (null), verbose
[ 34.844308] ufsd: Pages: total=3ecf, free=b21, buff=330, shift=15
[ 34.849138] ufsd: Page flags: lck=1, err=2, ref=4, upt=8, drt=10, wrb=2000, priv=800
[ 34.855611] ufsd: Buff flags: upt=1, drt=2, lck=4, map=20, new=40, del=200, aread=80, awrite=100
[ 34.863139] ufsd: “sdb”: size = 0xbaa0f4b00x200 >= 0x2ea83d20x8000
[ 34.868219] ufsd: “sdb”: no discard
[ 34.870423] ufsd:
[ 34.871136] ufsd: ======NTFSBoot->le(0)======
[ 34.874205] ufsd: Signature : 0x0000000000000000
[ 34.878242] ufsd: RWBlocks : 0xbaa0f4b0 x 0x200, sdb, rw
[ 34.883054] ufsd: SectorsPerVolume : 0x0 x 0x0
[ 34.886293] ufsd: SectorsPerCluster : 0x0
[ 34.889016] ufsd: MFT : 0x0
[ 34.891733] ufsd: MFTMirr : 0x0
[ 34.894449] ufsd: Record size : 0
[ 34.896992] ufsd: Index size : 0
[ 34.899542] ufsd: Magic : 0x55aa
[ 34.902521] ufsd: ===========================
[ 34.905585] ufsd: Invalid NTFS boot signature
[ 34.908669] ufsd:
[ 34.909382] ufsd: === HfsVolumeHeader->le =========
[ 34.912972] ufsd: Signature : 0x0f88
[ 34.915951] ufsd: Version : 40353
[ 34.918851] ufsd: Attributes : 0xfc053b4d
[ 34.922178] ufsd: LastMounted : \xffffffa0t?
[ 34.924983] ufsd: BytesPerBlock : 0xffc74c00
[ 34.928317] ufsd: Invalid HFS+ signature at 2
[ 34.931385] ufsd: failed to mount “sdb”
[ 34.933929] ufsd:fill_super failed to mount sdb: “unknown fs” ->-22
[ 328.888874] usb 1-1: USB disconnect, device number 2
[ 328.961583] hotPlug.sh begin(seq=630)…
[ 329.029571] hotPlug.sh end(seq=630).
PS posted this to show one of the ways to get a red light.