---
name: "iscsi-md5sum"
section: "1"
platform: "linux"
package: "libiscsi"
version: "1.20.3-1"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/iscsi-md5sum"
---

# iscsi-md5sum(1)

Utility to calculate MD5 value of an iSCSI LUN at range \[LBAm, LBAn)

## NAME

iscsi-md5sum - Utility to calculate MD5 value of an iSCSI LUN at range \[LBAm, LBAn)

## SYNOPSIS

**iscsi-md5sum \[ OPTIONS \] \<ISCSI-PORTAL\>**

**iscsi-md5sum** \[-i --initiator-name=\<IQN\>\] \[-o --offset\] \[-l --length\] \[-d --debug\] \[-? --help\] \[--usage\]

## DESCRIPTION

iscsi-md5sum is a utility to calculate MD5 value of an iSCSI LUN at range \[LBAm, LBAn).

## ISCSI PORTAL URL FORMAT

iSCSI portal format is 'iscsi://\[\<username\>\[%\<password\>\]@\]\<host\>\[:\<port\>\]'

Username and password are only required if the target requires CHAP authentication. Optionally you can specify the username and password via the environment variables LIBISCSI\_CHAP\_USERNAME and LIBISCSI\_CHAP\_PASSWORD.

Host can be specified either as a hostname, an IPv4 address or an IPv6 address. Examples:

```
	iscsi://192.0.2.1
	iscsi://[2001:DB8::1]:3261
	iscsi://ronnie%password@iscsi.example.com
```

Port is the TCP port on the target to connect to. Default is 3260.

## OPTIONS

\-i --initiator-name=\<IQN\>

This specifies the initiator-name that iscsi-md5sum will use when logging in to the target.

The default name is 'iqn.2007-10.com.github:sahlberg:libiscsi:iscsi-md5sum' but you can use this argument to override this. This is mainly needed for cases where the target is configured with access-control to only allow discovery logins from known initiator-names.

- \-o --offset

  Byte offset into the target from which to start calculating. The provided value must be aligned to the target sector size. The default value is zero.

- \-l --length

  The number of bytes to calculate (counting from the starting point). The provided value must be aligned to the target sector size. If the specified value extends past the end of the device, iscsi-md5sum will stop at the device size boundary. The default value extends to the end of the device.

- \-d --debug

  Print debug information.

- \-? --help

  Display basic help text.

- \--usage

  Display basic usage text.

## AUTHOR

zhenwei pi \<pizhenwei@bytedance.com\>

## SEE ALSO

[iscsi-inq(1)](/iscsi-inq/1.md) **http://github.com/sahlberg/libiscsi**