Ubuntu 12.04 Hot Plug SATA Safe removal

[NAS]

I have been scowering the internet trying to work out how to remotely via ssh safely remove a hot plug sata drive on Ubuntu 12.04 desktop

 

I know how to replicate unity mouting via SSH (udisks) and I know how to safely remove via ssh (sync, udisks, sg_start, cat to device in sys)  but it seems Unity (gvfs) auto detects the drive just after i do all this and makes it "less" safe to remove again.

 

Has anyone any experience/tips on how to deal with hot plug in Ubuntu 12.04

 

Cheers

 

Commands used in the process

 

#Detecting drive
blkid

#Mounting
udisks --mount /dev/sdc1

#Removing
sync
udisks --unmount /dev/sdc1
sg_start /dev/sdc --stop
echo 1 > /sys/block/sdc/device/delete

#Needs
sd-utils

 

Errors seen after i remove the drive include:

 

[39591.460304] ata2.00: disabled
[39605.572436] ata2: exception Emask 0x50 SAct 0x0 SErr 0x4090800 action 0xe fro                                               zen
[39605.572441] ata2: irq_stat 0x00400040, connection status changed
[39605.572445] ata2: SError: { HostInt PHYRdyChg 10B8B DevExch }
[39605.572453] ata2: hard resetting link
[39606.293054] ata2: SATA link down (SStatus 0 SControl 300)
[39606.309045] ata2: EH complete

 

 

[NAS]

OK so this method whilst showing some errors seems to have no negative effects. it is also better than just umounting and pulling a disk whilst it is till spinning.

 

I am sure there is a proper way out there somewhere but it is beyond me to find it.