Usage: fdisk [-l] [-b SSZ] [-u] device
E.g.: fdisk /dev/hda  (for the first IDE disk)
  or: fdisk /dev/sdc  (for the third SCSI disk)
  or: fdisk /dev/eda  (for the first PS/2 ESDI drive)
  or: fdisk /dev/rd/c0d0  or: fdisk /dev/ida/c0d0  (for RAID devices)
  ...
moulis@moulisland:~$ sudo fdisk -l
Password:

Disk /dev/hdb: 20.0 GB, 20020396032 bytes
255 heads, 63 sectors/track, 2434 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

   Device Boot      Start         End      Blocks   Id  System
/dev/hdb1   *           1        2330    18715693+  83  Linux
/dev/hdb2            2331        2434      835380    5  Extended
/dev/hdb5            2331        2434      835348+  82  Linux swap / Solaris
moulis@moulisland:~$ sudo hdparm /dev/hdb

/dev/hdb:
 multcount    =  0 (off)
 IO_support   =  0 (default 16-bit)
 unmaskirq    =  0 (off)
 using_dma    =  1 (on)
 keepsettings =  0 (off)
 readonly     =  0 (off)
 readahead    = 256 (on)
 geometry     = 38792/16/63, sectors = 39102336, start = 0
moulis@moulisland:~$