[SOLVED] Drives not detected when set to AHCI

[fraqtl]

Hey folks, I have just built my new server and it's working like a dream, when the SATA mode is set to IDE Enhanced.

 

Currently there are 5 discs in the array: One Caviar Black (parity drive) and 4 Caviar Greens (for the data obviously)

 

When I go into the BIOS (in my Supermicro X8SIL-F) and set it to AHCI, everything boots fine but it does detect the parity disk and drives 1 and 4. 2 and 3 detect as normal. In the web interface it has the drives listed as missing, with the obvious red buttons next to them.

 

When I change it back to Enhanced IDE it all works fine again.

 

I was playing around with these settings because my read speed has been crap. I don't really care about write speeds to be honest, they are acceptable at around 25ish MB/sec but the read speeds are on the order of 13MB/sec which if I am trying to run a couple burners off (I use an epson discproducer PP-100, or will be shortly) it's going to cause some burning issues. Those speeds are Megabytes, not Megabits by the way.

 

Anyway, I will get onto the speed issues at a later date but anyone got any idea what might be going on with the AHCI? I am running version 4.7 at the moment.

 

Cheers

[Joe L.]

Hey folks, I have just built my new server and it's working like a dream, when the SATA mode is set to IDE Enhanced.

 

Currently there are 5 discs in the array: One Caviar Black (parity drive) and 4 Caviar Greens (for the data obviously)

 

When I go into the BIOS (in my Supermicro X8SIL-F) and set it to AHCI, everything boots fine but it does detect the parity disk and drives 1 and 4. 2 and 3 detect as normal. In the web interface it has the drives listed as missing, with the obvious red buttons next to them.

 

When I change it back to Enhanced IDE it all works fine again.

 

I was playing around with these settings because my read speed has been crap. I don't really care about write speeds to be honest, they are acceptable at around 25ish MB/sec but the read speeds are on the order of 13MB/sec which if I am trying to run a couple burners off (I use an epson discproducer PP-100, or will be shortly) it's going to cause some burning issues. Those speeds are Megabytes, not Megabits by the way.

 

Anyway, I will get onto the speed issues at a later date but anyone got any idea what might be going on with the AHCI? I am running version 4.7 at the moment.

 

Cheers

After you change to AHCI mode you might need to re-assign the disks on the devices page.  Stop the array, re-assign them, and then re-start the array.

 

Joe L.

[fraqtl]

Sweet as, I'll do it in the morning. It won't cause issues with trying to format them or any nonsense like that? will just add them in and be happy (assuming I get them in the right slots of course)

[PeterB]

The drive identities will, indeed, change from hdx to sdx - this is why they will need to be reassigned.  unRAID should recognise your data drives - the only one that it will not recognise, if assigned as a data drive, will by your parity drive.  If one drive is reported as being unformatted, then that will be your parity - reassign that to the parity slot and all should be well.

[fraqtl]

Wait a sec, even in ide enhanced they are all registering as sdX rather than hdX. So is this still the solution to my problem?

 

I have been doing a lot of automated dvd ripping today so the server has been pretty busy and I haven't had a chance to implement the fix yet.

[joshpond]

Possibly, just pick the drop down menu and see if the correct disk can be selected.

 

I believe it depends on the motherboard.

 

Josh

[fraqtl]

I'll give it a crack as soon as this batch of discs is done ripping :-) I'll let you know how it goes

[fraqtl]

Worked a treat, thanks for the help folks