IBM TOTAL STORAGE DS8000 User Manual
Page 362
megabyte
(MB)
1)
For
processor
storage,
real
and
virtual
storage,
and
channel
volume,
2
20
or
1
048
576
bytes.
2)
For
disk
storage
capacity
and
communications
volume,
1
000
000
bytes.
Metro
Mirror
A
function
of
a
storage
server
that
maintains
a
consistent
copy
of
a
logical
volume
on
the
same
storage
server
or
on
another
storage
server.
All
modifications
that
any
attached
host
performs
on
the
primary
logical
volume
are
also
performed
on
the
secondary
logical
volume.
See
also
Remote
Mirror
and
Copy
and
Global
Copy.
MES
See
miscellaneous
equipment
specification.
MIB
See
management
information
base.
Micro
Channel
architecture
(MCA)
The
rules
that
define
how
subsystems
and
adapters
use
the
Micro
Channel
bus
in
a
computer.
The
architecture
defines
the
services
that
each
subsystem
can
or
must
provide.
Microsoft
Internet
Explorer
(MSIE)
Web
browser
software
manufactured
by
Microsoft.
migration
The
replacement
of
a
system
or
subsystem
with
a
different
type
of
system
or
subsystem,
such
as
replacing
a
SCSI
host
adapter
with
a
fibre-channel
host
adapter.
In
the
context
of
data
migration
regarding
the
DS8000,
the
transfer
of
data
from
one
storage
unit
to
another,
such
as
from
a
3390
to
the
DS8000.
MIH
See
missing-interrupt
handler.
mirrored
pair
Two
units
that
contain
the
same
data.
The
system
refers
to
them
as
one
entity.
mirroring
In
host
systems,
the
process
of
writing
the
same
data
to
two
disk
units
within
the
same
auxiliary
storage
pool
at
the
same
time.
miscellaneous
equipment
specification
(MES)
IBM
field-installed
change
to
a
machine.
missing-interrupt
handler
(MIH)
An
MVS
and
MVS/XA
facility
that
tracks
I/O
interrupts.
MIH
informs
the
operator
and
creates
a
record
whenever
an
expected
interrupt
fails
to
occur
before
a
specified
elapsed
time
is
exceeded.
MLC
See
machine
level
control.
mobile
solutions
terminal
(MoST)
The
mobile
terminal
used
by
service
personnel.
mode
conditioning
patch
cable
A
cable
that
converts
a
single-mode
signal
from
a
longwave
adapter
into
a
light
signal
that
is
appropriate
for
multimode
fibre.
Another
mode
conditioning
patch
cable
is
required
at
the
terminating
end
of
the
multimode
fibre
to
convert
the
signal
back
to
a
single-mode
signal
for
a
longwave
adapter.
Model
100
A
2105
Model
100,
often
simply
referred
to
as
a
Mod
100,
is
an
expansion
enclosure
for
the
Enterprise
Storage
Server.
See
also
2105.
MoST
See
mobile
solutions
terminal.
MRPD
See
machine
reported
product
data.
MSA
See
multiport
serial
adapter.
MSIE
See
Microsoft
Internet
Explorer.
MTBF
See
mean
time
between
failures.
Multipath
Subsystem
Device
Driver
See
IBM
TotalStorage
DS8000
Multipath
Subsystem
Device
Driver.
multiple
allegiance
A
DS8000
hardware
function
that
is
independent
of
software
support.
This
function
enables
multiple
system
images
to
concurrently
access
the
same
logical
volume
on
the
DS8000
as
long
as
the
system
images
are
accessing
different
extents.
See
also
extent
and
parallel
access
volumes.
Multiple
Device
Manager
(MDM)
A
component
of
the
IBM
TotalStorage
Productivity
Center
that
allows
administrators
to
configure,
manage,
and
monitor
the
performance
of
SAN
storage
devices
from
a
single
console.
multiple
relationship
FlashCopy
An
option
of
the
DS8000
that
creates
backup
copies
from
one
source
to
multiple
342
IBM
TotalStorage
DS8000:
Messages
Reference