Why don’t my SATA drives work in enclosures?

John Williams October 11, 2014

Hello, I bought 3 used 100Gb Seagate momentus drives. All work fine on internal SATA in my PC.

I had one old USB to SATA external enclosure, but HDD’s didn’t work. Went on Aria PC and bought
one CIT and one Dynamode enclosure.

HDDs stil don’t work – no drive works in in any enclosure.

How should I format an HDD to go into an external case? I tried NTFS and FAT 32 and exFAT and put
MBR on with Testdisk software.

Any help appreciated.

  1. ha14
    October 12, 2014 at 9:12 am

    try to use double-headed USB cable for additional power? There is a limit of how much power a single USB port can provide. 100 mA for USB up to 2.0 and 150 mA for USB 3.0.

    • Jan F.
      October 12, 2014 at 2:42 pm

      That is not entirely correct. Each USB Host Controller has a limit on power it can supply:
      5 units each 100 mA for USB up to 2.0 = 500 mA max.
      6 units each 150 mA for USB 3.0 = 900 mA max.

      Each USB Host controller is usually handling multiple USB ports on your computer. Therefor the units (or max. power) is shared across multiple USB ports.

  2. Jan F.
    October 12, 2014 at 12:22 am

    Since the drive appears to be working fine internal I guess it's an issue with it's controllers automatic power or acoustic management.

    Connect the drives to your computer internal and use a hard drive tool to deactivate/disable AAM/APM. If you don't have a tool you can use e.g. CrystalDiskInfo or HDD Scan
    * Functions > Advanced Features > AAM/APM control
    * New Task > Features > IDE features

    Once the drives are working I would set the APM to 128 (80h).

    • John Williams
      October 12, 2014 at 6:36 pm

      Thanks, I'll try that