3TB HDD not visible as NAS USB drive

I have a WD Red 3TB in a caddy which has been formatted 3TB NTFS under Win 7 and verified on XP. I've plugged it into a USB2 port on the back of my NAS to use for backups but the NAS doesn't see it. Any suggestions ?
8 answers Last reply
More about 3tb hdd visible nas usb drive
  1. What filesystem does your NAS use for storage?
  2. CompGee said:
    What filesystem does your NAS use for storage?

    The internal filesystem is EXT4, but it advises that you can use a variety of different file systems including NTFS on USB. To prove that the USB is working I plugged in a 16Gb memory stick and it's quite happy with that
  3. I would format the HDD to EXT4 (do it with GParted).
  4. Verify that your NAS supports drives over 2TB also.
  5. CompGee said:
    I would format the HDD to EXT4 (do it with GParted).

    Thanks, I'll give that a try
    Update - Formatted EXT4 but no different so I'm thinking that somewhere in the chain something can't address >2TB. My guess at the moment is that it's the USB on the back of the NAS. Clearly the NAS recognises >2TB internally because it's running RAID1 with two 3TB disks. And the caddy clearly supports >2TB because I used it to format the 3TB disk both NTFS and EXT4. So that only really leaves the NAS USB h/w or firmware.
    Update 2 - Partitioned down to 1.5TB and reformatted. Still not recognised by NAS. Got to think that there is a problem between the USBs on the NAS and the caddy.
    Update 3 - Solved - re-initialised the disk with MBR and a max size 2TB partition. plugged in to the NAS, up and running straight away. So, looks like the NAS didn't like GPT. Or for some reason it wasn't compatible with USB2. Either way, it's working which is all I needed.
  6. Hawkeye22 said:
    Verify that your NAS supports drives over 2TB also.

    There is no size specified in the NAS (Synology 413J) documentation for USB drives, it simply tells you that it supports USB drives and allows them to be formatted EXT3, EXT4, FAT & NTFS.
    Internal drives must be formatted EXT4 and can be up to 4TB. Mine runs WD Red 3TB hence the use of the same hardware as an external drive, it can be re-used as either a spare drive for the RAID, or as extra capacity.
  7. Does your caddy support 3tb sized drives? (not all do)
    How was this drive formatted? in the caddy & in the synology's usb port ?
  8. popatim said:
    Does your caddy support 3tb sized drives? (not all do)
    How was this drive formatted? in the caddy & in the synology's usb port ?

    Yes, the caddy supports drives up to 4TB, SATA III + USB3
    The drive was initialised and formatted in the caddy from Win7. The Synology won't see the caddy/drive so I couldn't use this to format it. I'm hoping that when it's re-formatted EXT4 (see above) that this may make a difference, but.......
Ask a new question

Read More

NAS / RAID USB Drive Storage Hard Drives Western Digital