Questions[external-hdd](ubuntu)

I'm getting these errors ramdomly, and I don't know if its normal or not.

[39441.061856] ata3.00: failed to read SCR 1 (Emask=0x40)
[39441.061866] ata3.01: failed to read SCR 1 (Emask=0x40)
[39441.061892] ata3.15: exception Emask 0x10 SAct 0x0 SErr 0x280100 action 0x6 frozen
[39441.061897] ata3.15: irq_stat 0x08000000, interface fatal error
[39441.061904] ata3.15: SError: { UnrecovData 10B8B BadCRC }
[39441.061910] ata3.00: exception Emask 0x100 SAct 0x0 SErr 0x0 action 0x6 frozen
[39441.061917] ata3.01: exception Emask 0x100 SAct 0xe SErr 0x0 action 0x6 frozen
[39441.061923] ata3.01: failed command: READ FPDMA QUEUED
[39441.061933] ata3.01: cmd 60/a8:08:b0:48:62/00:00:00:00:00/40 tag 1 ncq 86016 in
[39441.061940] ata3.01: status: { DRDY }
[39441.061944] ata3.01: failed command: READ FPDMA QUEUED
[39441.061953] ata3.01: cmd 60/a8:10:b0:49:62/00:00:00:00:00/40 tag 2 ncq 86016 in
[39441.061959] ata3.01: status: { DRDY }
[39441.061963] ata3.01: failed command: READ FPDMA QUEUED
[39441.061972] ata3.01: cmd 60/58:18:58:4a:62/00:00:00:00:00/40 tag 3 ncq 45056 in
[39441.061978] ata3.01: status: { DRDY }
[39441.061987] ata3.15: hard resetting link
[39441.608302] ata3.15: SATA link up 3.0 Gbps (SStatus 123 SControl 300)
[39441.609090] ata3.00: hard resetting link
[39441.929246] ata3.00: SATA link up 3.0 Gbps (SStatus 123 SControl 320)
[39441.929333] ata3.01: hard resetting link
[39442.249184] ata3.01: SATA link up 3.0 Gbps (SStatus 123 SControl 320)
[39442.263242] ata3.00: configured for UDMA/133
[39442.277570] ata3.01: configured for UDMA/133
[39442.277725] ata3: EH complete

I'm also pasting smartctl -a for sda, sdb and sdc.

Thanks in advance for your help.

I am running Ubuntu 11.10 and I own a Netgear N600 Wireless Dual Band Router with a USB port built into it. Naturally, the router came with instructions on how to mount and view this drive with both Windows and Mac, but nothing about Linux. I have an WD Elements 1 TB external HDD that I would like to plug into the router and share across my home network. However, when I plug it in, absolutely nothing happens on my desktop.

I checked on two different machines and nothing seems to indicate that the drive has been mounted (or is even seen at all) on either machine. I am fully aware that it may not be possible to do this with a Linux system, but I was hoping someone might have a suggestion.

Since a few days ago, my computer freezes whenever I sync my HDD with an external USB3 drive. When the keyboard gets temporarily a bit responsive I am able to switch to another terminal (Ctrl+Alt+F2) and I see the following image repeating continuously. I am on Ubuntu 11 using LuckyBackup.

What is going on? Is my hdd defective? Is it the external one? Something else?

Many thanks!

I want to spin down external hard drive from the terminal before unmounting.

It is an sata drive connected through usb.

Running hdparm gives this

 ry@G62x:/media$ hdparm -S10 937b2299-48ff-4a9c-8228-67ed4453e8fb/

 937b2299-48ff-4a9c-8228-67ed4453e8fb/:
 setting standby to 10 (50 seconds)
 HDIO_DRIVE_CMD(setidle) failed: Inappropriate ioctl for device

Does anyone know how to avoid getting this message:

Assuming drive cache: write through

Which is showing up after performing sudo shutdown -r now.

I restarted remotely but the computer did not restart. And I can't restore my remote connection to it. I want to be sure that it won't happen again. When I physically approached the computer and turned on the display, I found 3 lines saying:

Assuming drive cache: write through

All those messages were because of my sdd disk. Later I checked and found that sdd is my external USB 1TB disk.

Any ideas on how to prevent such situations in future?