A directory with the scsi mid-level pseudo-file and various SCSI
low-level driver directories, which contain a file for each SCSI host in
this system, all of which give the status of some part of the SCSI IO
subsystem. These files contain ASCII structures and are, therefore,
readable with cat(1).
You can also write to some of the files to reconfigure the subsystem or
switch certain features on or off.
/proc/scsi/scsi
This is a listing of all SCSI devices known to the kernel. The listing is
similar to the one seen during bootup. scsi currently supports only the
add-single-device command which allows root to add a hotplugged
device to the list of known devices.
will cause host scsi1 to scan on SCSI channel 0 for a device on ID 5 LUN
0. If there is already a device known on this address or the address is
invalid, an error will be returned.
/proc/scsi/drivername/
drivername can currently be NCR53c7xx, aha152x, aha1542, aha1740,
aic7xxx, buslogic, eata_dma, eata_pio, fdomain, in2000, pas16, qlogic,
scsi_debug, seagate, t128, u15-24f, ultrastore, or wd7000. These
directories show up for all drivers that registered at least one SCSI HBA.
Every directory contains one file per registered host. Every host-file is
named after the number the host was assigned during initialization.
Reading these files will usually show driver and host configuration,
statistics, and so on.
Writing to these files allows different things on different hosts. For
example, with the latency and nolatency commands, root can
switch on and off command latency measurement code in the eata_dma driver.
With the lockup and unlock commands, root can control bus
lockups simulated by the scsi_debug driver.