sg_zone - Man Page

sg_zone [--all] [--close] [--count=ZC] [--element=EID] [--finish] [--help] [--open] [--remove] [--sequentialize] [--timeout=SE] [--verbose] [--version] [--zone=ID] DEVICE

Sends a SCSI OPEN ZONE, CLOSE ZONE, FINISH ZONE, REMOVE ELEMENT AND MODIFY ZONES or SEQUENTIALIZE ZONE command to the DEVICE. All but the last two are found in the ZBC standard (INCITS 536-2016). The REMOVE ELEMENT AND MODIFY ZONES command was added in zbc2r07 while the SEQUENTIALIZE ZONE command was added in zbc2r01b.

One and only one of the --open, --close, --finish, --remove and --sequentialize options can be chosen.

The REPORT ZONES, REPORT REALMS and REPORT ZONE DOMAINS commands may be accessed via the sg_rep_zones utility. The ZONE ACTIVATE and ZONE QUERY commands may be accessed via the sg_z_act_query utility. The RESET WRITE POINTER command may be accessed via the sg_reset_wp utility.

Arguments to long options are mandatory for short options as well.

-a,  --all

sets the ALL field in the cdb.

-c,  --close

causes the CLOSE ZONE command to be sent to the DEVICE.

-C,  --count=ZC

ZC is placed in the Zone Count field in the cdb of all four commands supported by this utility. ZC should be a value from 0 to 65535 (0xffff) inclusive.

-e,  --element=EID

where EID is an element identifier which is a 32 bit unsigned integer starting at one. This field is used by the REMOVE ELEMENT AND MODIFY ZONES command and its default value is zero (which is invalid). So the user needs to supply a valid element identifier when --remove is used.

-f,  --finish

causes the FINISH ZONE command to be sent to the DEVICE.

-h,  --help

output the usage message then exit.

-o,  --open

causes the OPEN ZONE command to be sent to the DEVICE.

-r,  --remove

causes the REMOVE ELEMENT AND MODIFY ZONES command to be sent to the DEVICE. In practice, --element=EID needs to be also given.

-S,  --sequentialize

causes the SEQUENTIALIZE ZONE command to be sent to the DEVICE.

-t,  --timeout=SE

where SE is the command timeout in seconds. The default is 60 seconds and if 0 is given, it is mapped to 60. An alternate form is --tmo=SE.

-v,  --verbose

increase the level of verbosity, (i.e. debug output).

-V,  --version

print the version string and then exit.

-z,  --zone=ID

where ID is placed in the cdb's ZONE ID field. A zone id is a zone start logical block address (LBA). The default value is 0. ID is assumed to be in decimal unless prefixed with '0x' or has a trailing 'h' which indicate hexadecimal.

After a REMOVE ELEMENT AND MODIFY ZONES command has completed, the element in question is said to be depopulated and any affected zones are placed in the 'offline' zone condition.

SBC-4 has a similar command to REMOVE ELEMENT AND MODIFY ZONES called REMOVE ELEMENT AND TRUNCATE. The difference is that the latter "changes the association between LBAs and physical blocks" and the former does not change that association. In both cases, depopulated elements that have the 'Restoration Allowed' (RALWD) bit set (see sg_get_elem_status) may be restored with the RESTORE ELEMENTS AND REBUILD command (see sg_rem_rest_elem).

The exit status of sg_zone is 0 when it is successful. Otherwise see the sg3_utils(8) man page.

Written by Douglas Gilbert.

Report bugs to <dgilbert at interlog dot com>.

Copyright © 2014-2023 Douglas Gilbert
This software is distributed under a BSD-2-Clause license. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

sg_rem_rest_elem,sg_rep_zones,sg_reset_wp,sg_z_act_query(sg3_utils)

blkzone(8).