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NAME    [Toc]    [Back]

       SCSI, RAID - Small Computer System Interface

SYNOPSIS    [Toc]    [Back]

       dsk#, tape#_d#, cdrom#

DESCRIPTION    [Toc]    [Back]

       The  operating  system interfaces to disk and tape devices
       through the Small Computer System Interface (SCSI).   SCSI
       support  is limited to the HP-supplied storage devices and
       certain third-party  devices.  To  determine  which  named
       devices  are supported in the default system, refer to the
       file /etc/ddr.dbase.  For example, the  following  devices
       are  listed therein: Winchester disks: RZ24L, RZ25, RZ25L,
       RZ25M, RZ28M, RZ29B, RZ55, RZ56, RZ58, RZ73,  RZ74,  RX23,
       RX26, RX33, IOMEGA ZIP, RAID (Redundant Arrays of Independent
 Disks) SCSI controllers: HSZ10, HSZ40, HSZ80 Magnetic
       tapes:   TZ30,   TZK11,   TLZ06,  TKZ09,  TKZ60,  DLT8000,
       SDT-10000 Media Changers: TL800,  ESL9000  Optical  disks:
       RRD42, RRD43, RRD44

       Vendors can add their own devices to ddr.dbase.

       Refer  to  the  Software  Product  Description (SPD) for a
       given release of the operating system for more information
       on processor-specific device support.

       Under  the  operating system, a SCSI device is referred to
       by a device identifier that is assigned by  the  operating
       system.   This name has no relationship to the descriptive
       name of the device, although in previous releases  of  the
       operating  system  disks such as the RZ74 mapped to a system-assigned
 rz# logical name (where #  was  the  instance
       number of that disk.

       Current  logical  names  for SCSI disks and tapes take the
       forms specified in the rz(8) and  tz(7)  reference  pages,
       such as dsk?  and tape?.  Refer to the dsfmgr(8) reference
       page for the naming conventions for disks, tapes and other
       devices,  such  as  CD-ROM  readers. Refer to the hwmgr(8)
       reference page for information on determining device names
       and other device data.

   SCSI Device Limits    [Toc]    [Back]
       The  number of possible target device IDs is determined by
       the controller type and method of connection,  such  as  a
       multibus  connection  using  fibre  channel.  Refer to the
       emx(7) reference page for an example of device addressing.

   Device Special Files    [Toc]    [Back]
       The  dsfmgr  command  creates device special files for all
       the devices that are attached to SCSI  controllers.   This
       event  occurs  automatically  on  system  startup,  and no
       administrative intervention is required  unless  an  event
       requires  that  a  device  be  renamed or its I/O be reassigned.
  In such cases, you can use dsfmgr  and  hwmgr  to
       manage  SCSI  devices  and their associated device special
       files without the need to calculate values from their Bus,
       Target ID, and LUN data.

RESTRICTIONS    [Toc]    [Back]

       The  SCSI  device driver is not warrantied to operate with
       optical  disks  other   than   the   devices   listed   in
       /etc/ddr.dbase/.   The SCSI driver attempts to support, on
       a best-effort basis, disks and magnetic tapes supplied  by
       other vendors.

       The  following  notes  apply  to  the driver's handling of
       disks from other vendors: These disks are identified using
       the following command:

              # hwmgr -get attribute -a name

              This  command will return the device name SCSI-WWID
              (World-Wide Identifier) for all devices on the system,
  which  includes the model name of the device.
              You can filter the output by specifying  categories
              of devices.  Disks are assigned a default partition
              table. The default table can be modified by editing
              the     ccmn_rzxx_sizes[8]     entry     in     the
              /usr/sys/data/cam_data.c file. The  disklabel  command
 can also be used to modify the partition table
              on an RZxx disk.

SEE ALSO    [Toc]    [Back]

       atapi_ide(7), dsfmgr(8), emx(7), hwmgr(8),  rz(7),  tz(7),
       disklabel(8), ddr.dbase(4)

[ Back ]
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