<div dir="ltr">Hi,<div><br></div><div>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.</div><div><br></div><div><div>[ 35.183406] usb 1-1: new full-speed USB device number 2 using dwc_otg</div>
<div>[ 35.440812] usb 1-1: not running at top speed; connect to a high speed hub</div><div>[ 35.456740] usb 1-1: New USB device found, idVendor=0781, idProduct=5572</div><div>[ 35.479144] usb 1-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3</div>
<div>[ 35.501552] usb 1-1: Product: Cruzer Switch</div><div>[ 35.513147] usb 1-1: Manufacturer: SanDisk</div><div>[ 35.535614] usb 1-1: SerialNumber: 4C532000050910112450</div><div>[ 35.571416] scsi0 : usb-storage 1-1:1.0</div>
<div>[ 36.619687] scsi 0:0:0:0: Direct-Access SanDisk Cruzer Switch 1.20 PQ: 0 ANSI: 5</div><div>[ 36.651795] sd 0:0:0:0: [sda] 3908352 512-byte logical blocks: (2.00 GB/1.86 GiB)</div><div>[ 36.682780] sd 0:0:0:0: [sda] Write Protect is off</div>
<div>[ 36.709971] sd 0:0:0:0: [sda] Write cache: disabled, read cache: enabled, doesn't support DPO or FUA</div><div>[ 36.756973] sda: sda1</div></div><div><br></div><div><br></div><div>what is "doesn't support DPO or FUA" ? I am using Linux kernel 3.3.0. </div>
<div><br></div><div>Thanks,</div><div>Rahul B.</div></div>