[RndTbl] Linux 4K drive formatting

Adam Thompson athompso at athompso.net
Sat Jan 19 23:18:23 CST 2013

Short answer: yes, you should be worried.  However, I would double-check that output against both dmesg and the contents of /proc/partitions just in case there’s a 2TB limit built into fdisk.  (Actually, now that I think of it, there is.  You have to use [g]parted to make a 3TB partition, IIRC.)


-Adam Thompson

athompso at athompso.net

(204) 291-7950 - direct

(204) 489-6515 - fax


From: roundtable-bounces at muug.mb.ca [mailto:roundtable-bounces at muug.mb.ca] On Behalf Of Kevin McGregor
Sent: Saturday, January 19, 2013 5:54 PM
To: Continuation of Round Table discussion
Subject: [RndTbl] Linux 4K drive formatting


So... I picked up my lovely new WD Red 3 TB drives today and installed them in my home server.


Now what? :-)  Specifically, I'm running Ubuntu Server 10.04 LTS (2.6.32-45-server #102-Ubuntu SMP Wed Jan 2 22:53:00 UTC 2013 x86_64 GNU/Linux), and I'm wondering if I should upgrade to Precise before I do anything with the drives, or use them as-is. I know I should align the partitions at (at least) 4 KB boundaries, and 10.04 by default uses 1 MB alignment, so I should be okay there.


Should I worry that the drive reports

fdisk -l /dev/sdc


Disk /dev/sdc: 2199.0 GB, 2199023254528 bytes

255 heads, 63 sectors/track, 267349 cylinders

Units = cylinders of 16065 * 512 = 8225280 bytes

Sector size (logical/physical): 512 bytes / 512 bytes

I/O size (minimum/optimal): 512 bytes / 512 bytes


...instead of 3 TB, and thinks the sector and I/O size is 512 bytes?


Advice, please!



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