February 4, 201214 yr I'll try to keep this as short as possible. I've had my server running for quite awhile (version 4.5.6 I believe) and recently needed to replace 2 of the drives. I have a 2TB parity drive and 3 2TB data drives. I replaced the the parity drive no problem a couple weeks ago. I received 2 replacement EADS drives from Western Digital (both of the drives that needed to be replaced were the first two drives I bought when I built the server) a couple days ago. Precleared the first drive and went to swap it in for the first data disk in the server. This is where the trouble popped up. Right now I have a Seagate, EADS, EARS, and Samsung f4 in the server and they all show drive size of 1,957,514,552, which is what it's always been. This new EADS drive is showing up with a drive space of 2,147,483,616, thus not letting me use it for the first data drive since it's "bigger" than the parity drive. I'm impatient, so I'd rather not waste the time putting this new EADS drive in the parity slot and then turning around and swapping that drive into the data 1 spot. I'm wondering why 4 drives would show up identical and this one all of a sudden different. Any suggestions? I'm using an ASUS mobo btw.
February 4, 201214 yr The value of 1,957,514,552 should be 1,953,514,552 - maybe that's a typo. The fact that another drive appears larger suggests that it is really a 3TB drive, but since you are using unRAID 4.x, it can only see the first 2TB of it.
February 4, 201214 yr my ST32000542AS_5XW1Q6ST 2tb drive shows up as 1,953,514,552 My 2tb raid0 array shows up as 2,147,460,576 In the past it was not uncommon for drives to show up as slightly different sizes over the manufacturing lifetime of a particular model. Maxtor used to drive me crazy with it. When I upgraded to 4.7, it upgraded and expanded my parity drive a little bit. Maybe you want to upgrade to 4.7 before adding in the new drive.
February 4, 201214 yr Another option is to put an HPA on the WD EADS drives and size them according to the current parity size.
February 5, 201214 yr Author Another option is to put an HPA on the WD EADS drives and size them according to the current parity size. how would i go about doing this
February 5, 201214 yr Another option is to put an HPA on the WD EADS drives and size them according to the current parity size. how would i go about doing this using hdparm -N /dev/sd? where ? = drive letter of drive in question. with the -N it queries the drive, then by providing a number it sets the HPA drive size. I've never done it, I don't know too much about it, Look around the board, there are many discussions about it. See here: http://lime-technology.com/forum/index.php?topic=10577.msg136289#msg136289
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