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tz(7)
NAME
tz - SCSI magnetic tape interface
SYNOPSIS
Digital AlphaServer 8200 and Digital AlphaServer 8400 Qlogic ISP1020:
bus tlsb0 at nexus?
bus tiop0 at tlsb0 vector tioperror
bus isp0 at * vector ispintr
controller scsi0 at * vector scsiintr
controller scsi1 at * vector scsiintr
Digital AlphaServer 8200 and Digital AlphaServer 8400 DEC KZMSA:
bus tlsb0 at nexus?
bus tiop0 at tlsb0 vector tioperror
bus xmi0 at tiop? vector xmierror
bus xza0 at xmi?
controller scsi0 at * vector scsiintr
controller scsi1 at * vector scsiintr
DEC 7000/10000 DEC KZMSA:
bus lsb0 at nexus?
bus iop0 at lsb0 vector ioperror
bus xmi0 at iop0 vector xmierror
bus xza0 at xmi?
controller scsi0 at * vector scsiintr
controller scsi1 at * vector scsiintr
DEC 4000 DEC SIOP:
bus ibus0 at nexus?
bus lbus0 at ibus0
bus siop0 at lbus0 slot 0 vector siopcointr
controller scsi0 at * vector scsiintr
DEC 3000 NCR ASC:
bus tc0 at nexus?
bus tcds0 at * vector tcdsintr
controller scsi0 at * vector scsiintr
controller scsi1 at * vector scsiintr
DEC 3000 DEC KZTSA:
bus tc0 at nexus?
bus tza0 at * vector kztsaintr
controller scsi0 at * vector scsiintr
DEC PCI bus DEC KZPSA:
bus pci0 at *
bus pza0 at pci? vector pzaintr
controller scsi0 at * vector scsiintr
DEC PCI bus NCR 810:
bus pci0 at *
bus psiop at pci? vector psiopintr
controller scsi0 at * vector scsiintr
DEC PCI bus Qlogic ISP1020:
bus pci0 at *
bus isp0 at * vector ispintr
controller scsi0 at * vector scsiintr
DEC EISA bus Adaptec 1740:
bus eisa0 at *
bus aha0 at * vector ahaintr
controller scsi0 at * vector scsiintr
DEC PCI bus ITI 875:
bus pci0 at *
bus itpsa at pci? vector itpsaintr
controller scsi0 at * vector scsiintr
DESCRIPTION
The Small Computer System Interface (SCSI) tape driver provides a standard
tape drive interface as described in mtio(7). This is the tape driver for
any Digital SCSI tape device. Facilities are provided to allow the
addition of third-party SCSI tape drives to the system. Refer to the
ddr_config(8) and ddr.dbase(4) reference pages for instructions.
For reads from Beginning of Media (BOM), the density of the tape is
obtained from the drive. Autodensity selection is then used for all read
operations. This means that reads are performed in the density of the
tape.
For writes from BOM, the density, compression, and blocking factor of the
tape are set. The tape is written in the density, compression, and
blocking factor that the user has selected by specifying one of the
following device special files: rmt?a; rmt?l; rmt?m; or rmt?h. If the tape
is not at BOM, the same density, compression, and blocking factors are used
which the rest of the tape has been written with.
The following are the default densities for specific SCSI tape drives:
TZ30: Single-density drive.
rmt?a 6666 BPI
rmt?l 6666 BPI
rmt?m 6666 BPI
rmt?h 6666 BPI
TLZ04: Single-density drive.
rmt?a 61000 BPI
rmt?l 61000 BPI
rmt?m 61000 BPI
rmt?h 61000 BPI
TLZ06: Single-density drive, compaction support.
Read/write TLZ04 format.
rmt?a 61000 BPI
rmt?l 61000 BPI
rmt?m 61000 BPI, compaction turned on.
rmt?h 61000 BPI, compaction turned on.
TLZ07: Single-density drive, compaction support.
Read/write TLZ04 and TLZ06 format.
rmt?a 61000 BPI
rmt?l 61000 BPI
rmt?m 61000 BPI, compaction turned on.
rmt?h 61000 BPI, compaction turned on.
TSZ07: Dual-density drive.
rmt?a 6250 BPI
rmt?l 1600 BPI
rmt?m 1600 BPI
rmt?h 6250 BPI
TKZ08: Single-density drive (Exabyte 8200).
rmt?a 54000 BPI
rmt?l 54000 BPI
rmt?m 54000 BPI
rmt?h 54000 BPI
TKZ09: Dual-format drive, supports Exabyte 8200 and 8500
formats.
rmt?a 54000 BPI (8200 format)
rmt?l 54000 BPI (8200 format)
rmt?m 45434 BPI (8500 format)
rmt?h 45434 BPI (8500 format)
TZK10: QIC-format drive.
See description that follows.
TZK11: QIC-format drive.
See description that follows.
TZK20: Single-density drive (Tandberg TDC 3700 QIC-3210(MC)).
rmt?a 61040 BPI
rmt?l 61040 BPI
rmt?m 61040 BPI
rmt?h 61040 BPI
The following table lists the tape compatibility for CompactTape media and
the TZ85, TZ86, TZ87, TZ88, and TZ89 tape drives.
_______________________________________________________
Media Type Drive Type
_______________________________________________________
CompacTapeI TZ30, TK50
CompacTapeII TZ30, TK50, TK70, TZ85, TZ86
CompacTapeIII TZ85, TZ86, TZ87, TZ88, TZ89
CompacTapeIIIXT TZ88, TZ89
CompacTapeIV TZ88, TZ89
_______________________________________________________
The following tables provide information for the TZ85, TZ86, TZ87, TZ88,
and TZ89 tape drives. All of these tape drives support variable block size.
Note that in the capacity column, a number followed by an asterisk (*)
assumes a 2:1 compression ratio. The actual compression ratio may vary
depending on the type of data being compressed.
TZ85 Tape Drive Supported Formats
_________________________________________________________________________________________
Format Device Special Density Compression Capacity Cartridge I/O
File Name Code (GB)
_________________________________________________________________________________________
TK50 rmt?, a, l, m, h 00h N/A 95M CompacTapeII Read-only
TZ30 rmt?, a, l, m, h 00h N/A 95M CompacTapeII Read-only
TZ85 rmt?a 17h N/A 2.6 CompacTapeIII Read/Write
TZ85 rmt?l 17h N/A 2.6 CompacTapeIII Read/Write
TZ85 rmt?m 17h N/A 2.6 CompacTapeIII Read/Write
TZ85 rmt?h 17h N/A 2.6 CompacTapeIII Read/Write
_________________________________________________________________________________________
TZ86 Tape Drive Supported Formats
_________________________________________________________________________________________
Format Device Special Density Compression Capacity Cartridge I/O
File Name Code (GB)
_________________________________________________________________________________________
TK50 rmt?, a, l, m, h 00h N/A 95M CompacTapeII Read-only
TZ30 rmt?, a, l, m, h 00h N/A 95M CompacTapeII Read-only
TZ85 rmt?a 17h N/A 2.6 CompacTapeIII Read/Write
TZ85 rmt?l 17h N/A 2.6 CompacTapeIII Read/Write
TZ86 rmt?m 18h N/A 6.0 CompacTapeIII Read/Write
TZ86 rmt?h 18h N/A 6.0 CompacTapeIII Read/Write
_________________________________________________________________________________________
TZ87 Tape Drive Supported Formats
_______________________________________________________________________________________
Format Device Special Density Compression Capacity Cartridge I/O
File Name Code (GB)
_______________________________________________________________________________________
TZ85 rmt?a 17h N/A 2.6 CompacTapeIII Read/Write
TZ86 rmt?l 18h N/A 6.0 CompacTapeIII Read/Write
TZ87 rmt?m 00h Off 10.0 CompacTapeIII Read/Write
TZ87 rmt?h 00h On 20.0 * CompacTapeIII Read/Write
_______________________________________________________________________________________
TZ88 Tape Drive Supported Formats
_________________________________________________________________________________________
Format Device Special Density Compression Capacity Cartridge I/O
File Name Code (GB)
_________________________________________________________________________________________
TZ85 rmt?a 17h N/A 2.6 CompacTapeIII Read/Write
TZ86 rmt?l 18h N/A 6.0 CompacTapeIII Read/Write
TZ87 rmt?m 00h Off 10.0 CompacTapeIII Read/Write
TZ87 rmt?h 00h On 20.0 * CompacTapeIII Read/Write
TZ88 rmt?m 00h Off 15.0 CompacTapeIIIXT Read/Write
TZ88 rmt?h 00h On 30.0 * CompacTapeIIIXT Read/Write
TZ88 rmt?m 00h Off 20.0 CompacTapeIV Read/Write
TZ88 rmt?h 00h On 40.0 * CompacTapeIV Read/Write
_________________________________________________________________________________________
TZ89 Tape Drive Supported Formats
__________________________________________________________________________________________
Format Device Special Density Compression Capacity Cartridge I/O
File Name Code (GB)
__________________________________________________________________________________________
TZ85 rmt?a 1ah N/A 2.6 GB CompacTape III Read-only
TZ85 rmt?l 1ah N/A 2.6 GB CompacTape III Read-only
TZ86 rmt?a 1ah N/A 10.0 GB CompacTape III Read-only
TZ86 rmt?l 1ah N/A 10.0 GB CompacTape III Read-only
TZ87 rmt?a 1ah Off 10.0 GB CompacTape III Read-only
TZ87 rmt?l 1ah On 20.0 GB * CompacTape III Read-only
TZ87 rmt?m 00h Off 10.0 GB CompacTape III Read/Write
TZ87 rmt?h 00h On 20.0 GB * CompacTape III Read/Write
TZ88 rmt?a 1ah Off 15.0 GB CompacTapeIIIXT Read-only
TZ88 rmt?l 1ah Off 30.0 GB * CompacTapeIIIXT Read-only
TZ88 rmt?m 00h Off 15.0 GB CompacTapeIIIXT Read/Write
TZ88 rmt?h 00h On 30.0 GB * CompacTapeIIIXT Read/Write
TZ88 rmt?a 1ah Off 20.0 GB CompacTape IV Read/Write
TZ88 rmt?l 1ah On 40.0 GB * CompacTape IV Read/Write
TZ89 rmt?a 1ah Off 15.0 GB CompacTapeIIIXT Read-only
TZ89 rmt?l 1ah Off 30.0 GB * CompacTapeIIIXT Read-only
TZ89 rmt?m 00h Off 15.0 GB CompacTapeIIIXT Read/Write
TZ89 rmt?h 00h On 30.0 GB * CompacTapeIIIXT Read/Write
TZ89 rmt?m 00h Off 35.0 GB CompacTape IV Read/Write
TZ89 rmt?h 00h On 70.0 GB * CompacTape IV Read/Write
__________________________________________________________________________________________
The following formats are supported for the TZK10 QIC-format tape drive:
QIC-24 (read-only) 512-byte block size; QIC-120 and QIC-150 (read/write)
512-byte block size; and QIC-320 (read/write) variable block size. With
QIC-format tapes, except QIC-320 and QIC-525, all read and write operations
must be in multiples of the block size because record boundaries are not
preserved. Use the following device special file names to select QIC
densities:
_________________________________________________________________________
Format Device Special Block Size Capacity Cartridge I/O
File Name
_________________________________________________________________________
QIC-24 rmt?a fixed 512 60MB DC600A Read-only
QIC-120 rmt?l, fixed 512 120MB DC6150, Read/Write
QIC-150 rmt?m, fixed 512 150MB DC6150, Read/Write
QIC-320 rmt?h variable 320MB DC6320 Read/Write
QIC-525 rmt?h variable 525MB DC6525 Read/Write
_________________________________________________________________________
The following formats are supported for the TZK11 QIC-format tape drive:
QIC-24 (read only) 512-byte block size; QIC-120 and QIC-150 (read/write)
512-byte block size; and QIC-320/525/1Gig/2Gig (read/write) variable block
size. With QIC-format 24/120/150 tapes, all read and write operations must
be in multiples of the block size because record boundaries are not
preserved. Use the following device special file names to select QIC
densities:
_________________________________________________________________________
Format Device Special Block Size Capacity Cartridge I/O
File Name
_________________________________________________________________________
QIC-24 rmt?a, fixed 512 60MB DC600A Read-only
rmt?h
QIC-120 rmt?l, fixed 512 120MB DC6150, Read/Write
rmt?h DC600XTD
QIC-150 rmt?m fixed 512 150MB DC6150, Read/Write
rmt?h DC600XTD
QIC-320 rmt?h variable 320MB DC6320 Read/Write
QIC-525 rmt?h variable 525MB DC6525 Read/Write
QIC-1G rmt?h variable 1G DC9000 Read/Write
QIC-2G rmt?h variable 2G DC9000 Read/Write
_________________________________________________________________________
The TZK11 tape drive uses autodensity select feature of the drive. The 2
Gig density can only be written on a 2 Gig cartridge. The 1 Gig density
can only be written on a 1 Gig cartridge. The 320/525 cartridge can be
used to write 120/150/320/525 densities.
With all fixed-block tape devices, when you use the dd command to transfer
a file to tape you must use padding to complete a block by specifying the
conv=sync option. For example, the following two dd commands use the
conv=sync option to transfer the /etc/motd file with a size of
approximately 400 bytes to the QIC-format tape drives:
dd if=/etc/motd of=/dev/rmt0m bs=10k conv=sync
dd if=/etc/motd of=/dev/rmt0l bs=512 conv=sync
The TZ30 and TLZ04 tape drives require a SCSI Bus Device Reset (BDR) be
sent to these devices when scanning the SCSI bus during the boot sequence.
An attribute has been added to the TZ30 and TLZ04 section of the
/etc/ddr.dbase text database file which triggers a BDR to these devices at
boot time. This attribute looks like:
ATTRIBUTE:
AttributeName = "BDRatBoot"
Length = 1
UBYTE[0] = 1
The data field of 1 also tells the driver not to continue scanning LUNs for
this target when this attribute is found.
Tape Support
Refer to the Software Product Description (SPD) for information on the
specific tape devices that are supported. Refer to the Systems and Options
Catalog (SOC) for information on which devices are supported on the various
system platforms.
EXAMPLES
The following example shows the configuration specification that you might
have for a DEC 3000 Model 500 system with a PMAZC controller in slot 0 and
KZTSA devices in slots 1 and 2:
bus tc0 at nexus?
bus tcds0 at tc0 slot 6 vector tcdsintr # onboard scsi
bus tcds1 at tc0 slot 0 vector tcdsintr # PMAZC in tc slot 0
bus tza0 at tc0 slot 1 vector kztsaintr # KZTSA in tc slot 1
bus tza1 at tc0 slot 2 vector kztsaintr # KZTSA in tc slot 2
controller scsi0 at tcds0 slot 0 vector scsiintr # Internal port
controller scsi1 at tcds0 slot 1 vector scsiintr # External port
controller scsi2 at tcds1 slot 0 vector scsiintr # A port
controller scsi3 at tcds1 slot 1 vector scsiintr # B port
controller scsi4 at tza0 slot 0 vector scsiintr
controller scsi5 at tza1 slot 0 vector scsiintr
ERRORS
All diagnostic messages are sent to the error logger subsystem.
FILES
/dev/rmt???, /dev/nrmt???
RELATED INFORMATION
ddr.dbase(4), ddr_config(8), mtio(7), RAID(7), SCSI(7), MAKEDEV(8),
uerf(8), tapex(8)