man(1) Manual page archive

     WREN(3)                                                   WREN(3)

          wren, ata - hard disk interface

          bind #H[drive] /dev
          bind #w[target[.lun]] /dev


          The hard disk interfaces (wren, #w, is a SCSI disk; ata, #H,
          is an IDE or ATA disk) serve a one-level directory giving
          access to the hard disk partitions.  The parameter to attach
          defines the numerical SCSI target and logical unit number or
          the IDE drive number to access.  Both default to zero.

          Each partition name is prefixed by hd and the numeric drive
          identifier.  The partition `disk' always exists and covers
          the entire disk.  The size of each partition as reported by
          stat(2) is the number of bytes in the partition, so the size
          of `disk' is the size of the entire disk.

          The partition `partition' also always exists; it is the last
          block on the disk for SCSI, second to last for IDE.  If it
          contains valid partition data, those partitions will be vis-
          ible as well.  Every time the device is bound, the parti-
          tions are updated to reflect any changes in the partition

          The format of the partition file is the string

               plan9 partitions

          on a line, followed by partition specifications, one per
          line, consisting of a name and textual strings for the block
          start and limit for each partition on the disk.

          The program prep(8) writes the partition table for the disk;
          its use is preferred to writing it by hand.

          prep(8), scsi(3)