Managing Devices in Oracle® Solaris 11.2

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Updated: July 2014

Using Advanced Format Disks

Oracle Solaris can support large capacity disks, also known as advanced format (AF) disks. AF disks are hard disk drives that exceed the traditional 512-byte block size that previous releases support.

AF disks are generally in the 4-KB block size range, but vary as follows:

  • A 4-KB native disk (4kn) has a physical and logical block size of 4 KB

  • A 512-byte emulation (512e) has a physical block size of 4 KB but reports a logical block size of 512 bytes

Oracle Solaris also supports the 512-byte native (512n) disk, which is a traditional disk with 512-byte block size.

Before purchasing advanced format drives, confirm with your device manufacturer that their 512e devices have a power-safe feature. This feature prevents data loss after a power failure while data is still in transit.

To determine if your system has AFD-supported disks, use the devprop command.

# devprop -n device-path

The following examples show the command output for different disk types.

  • For a 4-Kb native disk

    # devprop -n /dev/rdsk/c0t0d0s0 device-blksize device-pblksize
  • For a 512n disk

    # devprop -n /dev/rdsk/c1t0d0s0 device-blksize device-pblksize
  • For a 512e disk

    # devprop -n /dev/rdsk/c2t0d0s0 device-blksize device-pblksize