/usr/share/snmp/mibs/UCD-DISKIO-MIB.txt is in libsnmp-base 5.7.3+dfsg-1.8ubuntu3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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--
-- Derived from the original VEST-INTERNETT-MIB. Open issues:
--
-- (a) where to register this MIB?
-- (b) use not-accessible for diskIOIndex?
--
IMPORTS
MODULE-IDENTITY, OBJECT-TYPE, Integer32, Counter32, Counter64
FROM SNMPv2-SMI
DisplayString
FROM SNMPv2-TC
ucdExperimental
FROM UCD-SNMP-MIB;
ucdDiskIOMIB MODULE-IDENTITY
LAST-UPDATED "200504200000Z"
ORGANIZATION "University of California, Davis"
CONTACT-INFO
"This mib is no longer being maintained by the University of
California and is now in life-support-mode and being
maintained by the net-snmp project. The best place to write
for public questions about the net-snmp-coders mailing list
at net-snmp-coders@lists.sourceforge.net.
postal: Wes Hardaker
P.O. Box 382
Davis CA 95617
email: net-snmp-coders@lists.sourceforge.net
"
DESCRIPTION
"This MIB module defines objects for disk IO statistics."
REVISION "200504200000Z"
DESCRIPTION
"Add 64 bit counters. Patch from Dan Nelson."
REVISION "200202130000Z"
DESCRIPTION
"Add 1, 5 and 15-minute load average objects"
REVISION "200001260000Z"
DESCRIPTION
"SMIv2 version derived from older definitions contained
in the VEST-INTERNETT-MIB module."
::= { ucdExperimental 15 }
diskIOTable OBJECT-TYPE
SYNTAX SEQUENCE OF DiskIOEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"Table of IO devices and how much data they have read/written."
::= { ucdDiskIOMIB 1 }
diskIOEntry OBJECT-TYPE
SYNTAX DiskIOEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"An entry containing a device and its statistics."
INDEX { diskIOIndex }
::= { diskIOTable 1 }
DiskIOEntry ::= SEQUENCE {
diskIOIndex Integer32,
diskIODevice DisplayString,
diskIONRead Counter32,
diskIONWritten Counter32,
diskIOReads Counter32,
diskIOWrites Counter32,
diskIOLA1 Integer32,
diskIOLA5 Integer32,
diskIOLA15 Integer32,
diskIONReadX Counter64,
diskIONWrittenX Counter64
}
diskIOIndex OBJECT-TYPE
SYNTAX Integer32 (0..65535)
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Reference index for each observed device."
::= { diskIOEntry 1 }
diskIODevice OBJECT-TYPE
SYNTAX DisplayString
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The name of the device we are counting/checking."
::= { diskIOEntry 2 }
diskIONRead OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of bytes read from this device since boot."
::= { diskIOEntry 3 }
diskIONWritten OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of bytes written to this device since boot."
::= { diskIOEntry 4 }
diskIOReads OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of read accesses from this device since boot."
::= { diskIOEntry 5 }
diskIOWrites OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of write accesses to this device since boot."
::= { diskIOEntry 6 }
diskIOLA1 OBJECT-TYPE
SYNTAX Integer32 (0..100)
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The 1 minute average load of disk (%)"
::= { diskIOEntry 9 }
diskIOLA5 OBJECT-TYPE
SYNTAX Integer32 (0..100)
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The 5 minute average load of disk (%)"
::= { diskIOEntry 10 }
diskIOLA15 OBJECT-TYPE
SYNTAX Integer32 (0..100)
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The 15 minute average load of disk (%)"
::= { diskIOEntry 11 }
diskIONReadX OBJECT-TYPE
SYNTAX Counter64
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of bytes read from this device since boot."
::= { diskIOEntry 12 }
diskIONWrittenX OBJECT-TYPE
SYNTAX Counter64
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of bytes written to this device since boot."
::= { diskIOEntry 13 }
END
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