HP StorageWorks 1000i HP StorageWorks 1000i Virtual Library System User Guide - Page 120

level, storage, redundancy, serial, simple, network, management, tocol, small, computer, systems,

Get HP StorageWorks 1000i - Virtual Library System PDF manuals and user guides View all HP StorageWorks 1000i manuals
Add to My Manuals
Save this manual to your list of manuals

Page 120 highlights

RAID A RAID volume appears to the operating system to be a single logical disk. RAID improves performance by disk striping, which involves partitioning each drive's storage space into units. By placing data on multiple disks, I/O operations can overlap in a balanced way, improving performance. RAID 5-level data storage Provides data striping at the byte level and also stripe error correction information. RAID 5 configurations can tolerate one drive failure. Even with a failed drive, the data in a RAID 5 volume can still be accessed normally. redundancy In a redundant system, if you lose part of the system, it can continue to operate. For example, if you have two power supplies with one that takes over if the other one dies, that's redundancy. serial ATA disk The evolution of the ATA (IDE) interface that changes the physical architecture from parallel to serial and from master-slave to point-to-point. Unlike parallel ATA interfaces that connect two drives; one configured as master, the other as slave, each serial ATA drive is connected to its own interface. simple network management pro­ tocol (SNMP) A widely used network monitoring and control protocol. Data is passed from SNMP agents, which are hardware and/or software processes reporting activity in each network device (hub, router, bridge, etc.) to the workstation console used to oversee the network. The agents return information contained in a MIB (Management Information Base), which is a data structure that defines what is obtainable from the device and what can be controlled (turned off, on, etc.). small computer systems interface (SCSI) A standard, intelligent parallel interface for attaching peripheral devices to computers, based on a device independent protocol. SMTP Simple Mail Transfer Protocol. A transmission control protocol/Internet protocol (TCP/IP) protocol that allows the user to create, send, and receive text messages. SMTP protocols specify how messages are passed across a link from one system to another. They do not specify how the mail application accepts, presents, or stores the mail. storage pool Multiple disk arrays logically grouped together from which the dynamic disk file system allocates storage. The disk arrays in a VLS are automatically configured into one storage array. tape drive (1) A device that reads data from and writes data onto tape. (2) A software emulation of a tape drive is called a virtual tape drive. virtual library sys­ A computer system that appears as a tape library to other systems on a network. tem (VLS) A computer system that emulates a tape library. virtual tape Also known as a piece of virtual media or a VLS cartridge. A disk drive buffer that emulates one physical tape to the host system and appears to the host backup application as a physical tape. The same application used to back up to tape is used, but the data is stored on disk. Data can be written to and read from the virtual tape, and the virtual tape can be migrated to physical tape. virtual tape drive An emulation of a physical transport in a virtual tape library that looks like a physical tape transport to the host backup application. The data written to the virtual tape drive is really being written to disk. See also virtual tape library. virtual tape library A disk drive buffer containing virtual tape and virtual tape drives. See also virtual tape drive. 120 Glossary

  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
  • 12
  • 13
  • 14
  • 15
  • 16
  • 17
  • 18
  • 19
  • 20
  • 21
  • 22
  • 23
  • 24
  • 25
  • 26
  • 27
  • 28
  • 29
  • 30
  • 31
  • 32
  • 33
  • 34
  • 35
  • 36
  • 37
  • 38
  • 39
  • 40
  • 41
  • 42
  • 43
  • 44
  • 45
  • 46
  • 47
  • 48
  • 49
  • 50
  • 51
  • 52
  • 53
  • 54
  • 55
  • 56
  • 57
  • 58
  • 59
  • 60
  • 61
  • 62
  • 63
  • 64
  • 65
  • 66
  • 67
  • 68
  • 69
  • 70
  • 71
  • 72
  • 73
  • 74
  • 75
  • 76
  • 77
  • 78
  • 79
  • 80
  • 81
  • 82
  • 83
  • 84
  • 85
  • 86
  • 87
  • 88
  • 89
  • 90
  • 91
  • 92
  • 93
  • 94
  • 95
  • 96
  • 97
  • 98
  • 99
  • 100
  • 101
  • 102
  • 103
  • 104
  • 105
  • 106
  • 107
  • 108
  • 109
  • 110
  • 111
  • 112
  • 113
  • 114
  • 115
  • 116
  • 117
  • 118
  • 119
  • 120
  • 121
  • 122
RAID
A RAID volume appears
to the
operating system to be a single
logical disk.
RAID
improves
performance
by
disk
striping,
which
involves
partitioning
each
drive’s
storage
space
into
units.
By
placing
data
on
multiple
disks,
I/O
operations
can
overlap
in
a
balanced
way,
improving
performance.
RAID
5-level
data
storage
Provides
data
striping
at
the
byte
level
and
also
stripe
error
correction
information.
RAID
5
con
fi
gurations
can
tolerate
one
drive
failure.
Even
with
a
failed
drive,
the data in a RAID
5 volume can
still be accessed normally.
redundancy
In
a
redundant
system,
if
you
lose
part
of
the
system,
it
can
continue
to
operate.
For
example,
if
you
have
two
power
supplies
with
one
that
takes
over
if
the
other
one
dies,
that’s
redundancy.
serial
ATA
disk
The
evolution
of
the
ATA
(IDE)
interface
that
changes
the
physical
architecture
from
parallel
to
serial
and
from
master-slave
to
point-to-point.
Unlike
parallel
ATA
interfaces
that
connect
two
drives;
one
con
fi
gured
as
master,
the
other
as
slave,
each
serial
ATA
drive
is
connected
to
its
own
interface.
simple
network
management
pro-
tocol
(SNMP)
A
widely
used
network
monitoring
and
control
protocol.
Data
is
passed
from
SNMP
agents,
which
are
hardware
and/or
software
processes
reporting
activity
in
each
network
device
(hub,
router,
bridge,
etc.)
to
the
workstation
console
used
to
oversee
the
network.
The
agents
return
information
contained
in
a
MIB
(Management
Information
Base),
which
is
a
data
structure
that
de
fi
nes
what
is
obtainable
from
the
device
and
what
can
be
controlled
(turned
off,
on,
etc.).
small
computer
systems
interface
(SCSI)
A
standard,
intelligent
parallel
interface
for
attaching
peripheral
devices
to
computers,
based
on
a
device
independent
protocol.
SMTP
Simple
Mail
Transfer
Protocol.
A
transmission
control
protocol/Internet
protocol
(TCP/IP)
protocol
that
allows
the user to create,
send, and
receive text messages.
SMTP
protocols
specify
how
messages
are
passed
across
a
link
from
one
system
to
another.
They
do
not
specify
how
the
mail
application
accepts,
presents,
or
stores
the
mail.
storage
pool
Multiple
disk
arrays
logically
grouped
together
from
which
the
dynamic
disk
fi
le
system
allocates
storage.
The
disk
arrays
in
a
VLS
are
automatically
con
fi
gured
into
one
storage
array.
tape
drive
(1)
A
device
that
reads
data
from
and
writes
data
onto
tape.
(2)
A
software
emulation
of
a
tape
drive
is
called
a
virtual
tape
drive.
virtual
library
sys-
tem
(VLS)
A
computer
system
that
appears
as
a
tape
library
to
other
systems
on
a
network.
A
computer
system
that
emulates
a
tape
library.
virtual
tape
Also
known
as
a
piece
of
virtual
media
or
a
VLS
cartridge.
A
disk
drive
buffer
that
emulates
one
physical
tape
to
the
host
system
and
appears
to
the
host
backup
application
as
a
physical
tape.
The
same
application
used
to
back
up
to
tape
is
used,
but
the
data
is
stored
on
disk.
Data
can
be
written
to
and
read
from
the
virtual
tape,
and
the
virtual
tape
can
be
migrated
to
physical
tape.
virtual
tape
drive
An
emulation
of
a
physical
transport
in
a
virtual
tape
library
that
looks
like
a
physical
tape
transport
to
the
host
backup
application.
The
data
written
to
the
virtual
tape
drive
is
really
being
written
to
disk.
See
also
virtual
tape
library.
virtual
tape
library
A
disk
drive
buffer
containing
virtual
tape
and
virtual
tape
drives.
See
also
virtual
tape
drive.
120
Glossary