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Plan 9 - man page for wren (plan9 section 3)

WREN(3) 				       Library Functions Manual 				      WREN(3)

wren, ata - hard disk interface
bind #H[drive] /dev bind #w[target[.lun]] /dev /dev/hd0disk /dev/hd0partition /dev/sd0disk /dev/sd0partition ...
The hard disk interfaces (wren, #w, is a SCSI disk; ata, #H, is an IDE or ATA disk) serve a one-level direc- tory 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 always exists and cov- ers the entire disk. The size of each partition as reported by stat(2) is the number of bytes in the parti- tion, so the size of is the size of the entire disk. The 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 visible as well. Every time the device is bound, the partitions are updated to reflect any changes in the partition file. 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)
/sys/src/9/port/devwren.c /sys/src/9/pc/devata.c WREN(3)

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