External Hard Drive Unmounting...

[GulfVetSAF]

Quick question;

For some reason my external hard drive randomly unmounts (I use it for Time Machine)...

Any suggestions as to the cause or a solution? I have another external drive as well and this never happens.

Thanks!

 

[Burnspot]

I could be completely wrong, but I think since Time Machine only needs the disk every once it awhile, it'll unmount the drive in between those periods. I noticed that my external TM drive (through AEBS) mounts and unmounts at pretty regular intervals when TM needs it.

 

[GulfVetSAF]

Burn,

Thanks, I had guessed as much. However, it doesn't remount (automatically) for me... the only way I know how to get it to mount is to restart or log out. Is there a way to "discover" externals and mount them manually?

thanks for the input

 

[logana]

Burn,

Is there a way to "discover" externals and mount them manually?

Normally Disc Utility - but I am realising that there must be some bug in Leopard because sometimes attached hard disks don't seem to mount or USB2 disks mount on the USB 1.1 bus.

I guess I am not alone.

My USB Time Machine external does not unmount between the hourly backups so I don't understand why yours does.

 

[scienide09]

Does your external automatically shut down or go into "sleep" mode when it is not accessed for a while?

If so, and it does this whether or not it's connected to your Mac, than it's likely a power-saving feature of the drive itself, a feature intended to prolong the life of the external.

 

[GulfVetSAF]

Thanks everyone for the input... I'm not certain if it actually goes to sleep... it's a MyBook 750gb and when it's unmounted the light IS on... I'll have to look up the specs and see if that's a feature or not. It's not a big issue as I only backup once a day using Time Machine Scheduler... (which I was wondering might be the cause because I don't recall it doing that before)... Anyway, keep the questions and suggestions coming... I hate simply not knowing.

Semper Fi

Scott

 

[orpheus1120]

Ah... I guess as much when I read the start of this thread.

The problem as I suspect is highly due to a not up to date firmware for your My book. The problem you face is exactly the symptom faced by many other users who have not update their mybook firmware to be Leopard compliance.

No problem though, come HERE and see if it solves your problem.

Yours a studio, office, world or ...?? Choose your spec from the list and get the firmware update!

 

[GulfVetSAF]

Ah... I guess as much when I read the start of this thread.

The problem as I suspect is highly due to a not up to date firmware for your My book. The problem you face is exactly the symptom faced by many other users who have not update their mybook firmware to be Leopard compliance.

No problem though, come HERE and see if it solves your problem.

Yours a studio, office, world or ...?? Choose your spec from the list and get the firmware update!

Orpheus

Thanks for the data... did the upgrade, now just to wait and see if it worked. I'll keep ya updated.

Appreciate everyone's input!

Thank you

Scott
USMC Ret.

 

[orpheus1120]

No problem. Keep us updated.

 

[GulfVetSAF]

Well, it's still happening. I was just sitting here and noticed that it's unmounted again. However, I did figure out that I can go into disk utility, right click on the drive and mount it that way... more efficient and quicker than logging off.

If anyone comes up with a new answer, please pass it along. I'll keep subscribed to this thread so I'll know if someone posts a solution.

Thanks again!

Funk