sg_start does not support some USB External Hard Disk
I'm a user of sg3_utils-1.28.
When I use sg_start to spin down some USB External Hard Disk , some does work and some does not work , can you give me some advise?
I have tried commands listed below, they all failed:
sg_start --stop /dev/sda
sg_start --pc=2 /dev/sda
sg_start --pc=3 /dev/sda
sg_start --pc=5 /dev/sda
I have tried USB enclosures listed below, they all failed:
Brand / Chipset &nb
sp; / Size / Type / Err Msg
Tekram / Ali m5621 / 2.5 / IDE /
Sonny / Au8390 / 2.5 / IDE /
Hitachi / CY7C68300C-56PVXC / 2.5 / IDE /
IBM / B31-MBL
/ 2.5 / IDE /
Newman / GL811E / 2.5 / IDE / invalid field in cdb
GigaSave / GL850 0452MKOY1-16 / 3.5 / IDE /
Keshuo / JM20339 / 3.5 / SATA /
Thank you for your help!