OK, updated my Gigabyte bios to allow me to get rid of HPA.  It was disabled by default once the bios was applied.  Now that I know that, I want to remove it from the disks.

 

I was able to run the command to remove it, I re-booted and I now have the check box that I am sure I was to start the array and the re-build.  However, before I do that, I wanted to ask if I am allowed to remove it from 2 disks at once?  I figure if I can I will and then it is only one re-build and parity check vs two re-builds and like 3 parity checks.

 

Thanks

I have never removed HPA from an array disk.  I did not think you needed to do a rebuild in that situation.  Might want to recheck the instructions to be sure.

 

But one thing I am sure of.  unRAID can only rebuild one disk at a time.  If two drives fail at the same time, you lose the data on both of them.  So if removing HPA requires you rebuild a disk, you had better do it one disk at a time or you will lose your data.

 

Think of it another way.  Say you have 10 disks all with HPA and parity is the only disk without an HPA.  And you removed the HPA from all of the 10 and need to rebuild them all.  How would one parity disk be able to rebuild all of those data disks all by itself?  If such compression were possible, we'd all be using it!

You have to remove it from one disk at a time and then rebuild that disk. The disk no longer matches what unRAID thinks it should be because the disk appears slightly larger. I believe you should unassign the disk and start the array one time without it assigned. Then, when you assign it again you will get the rebuild option and it will properly rebuild.

 

Peter

Perfect, thank you, started array, drive re-building.  Will report once both disks complete, but I think we are set.

Drive one complete, drive 2 is re-building now.

 

Also, I should point out I did finally find this post while searching for something else.

http://lime-technology.com/forum/index.php?topic=2642.msg68485#msg68485