doesn't support DPO or FUA

[Rahul Bedarkar]

Hi,

When I attach pen-drive, I am seeing following logs. And when I
remove pen-drive, file system does not unmount for 10-15 secs.

[   35.183406] usb 1-1: new full-speed USB device number 2 using dwc_otg
[   35.440812] usb 1-1: not running at top speed; connect to a high speed
hub
[   35.456740] usb 1-1: New USB device found, idVendor=0781, idProduct=5572
[   35.479144] usb 1-1: New USB device strings: Mfr=1, Product=2,
SerialNumber=3
[   35.501552] usb 1-1: Product: Cruzer Switch
[   35.513147] usb 1-1: Manufacturer: SanDisk
[   35.535614] usb 1-1: SerialNumber: 4C532000050910112450
[   35.571416] scsi0 : usb-storage 1-1:1.0
[   36.619687] scsi 0:0:0:0: Direct-Access     SanDisk  Cruzer Switch
 1.20 PQ: 0 ANSI: 5
[   36.651795] sd 0:0:0:0: [sda] 3908352 512-byte logical blocks: (2.00
GB/1.86 GiB)
[   36.682780] sd 0:0:0:0: [sda] Write Protect is off
[   36.709971] sd 0:0:0:0: [sda] Write cache: disabled, read cache:
enabled, doesn't support DPO or FUA
[   36.756973]  sda: sda1


what is "doesn't support DPO or FUA" ? I am using Linux kernel 3.3.0.

Thanks,
Rahul B.
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