Sun Microsystems T3 用户手册
Chapter 2
Configuring Global Parameters
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Second, you can use third-party software on the host system to create as many
partitions as desired from a given volume. In the Solaris environment, you can
use VERITAS Volume Manager or Solaris Logical Volume Management (SLVM)
formerly known as Solstice DiskSuite (SDS) for this purpose.
partitions as desired from a given volume. In the Solaris environment, you can
use VERITAS Volume Manager or Solaris Logical Volume Management (SLVM)
formerly known as Solstice DiskSuite (SDS) for this purpose.
Note –
For information on using the
format
utility, refer to the
format
(1M) man
page. For more information on third-party software or VERITAS Volume Manager,
refer to the documentation for that product.
refer to the documentation for that product.
RAID 0
Data blocks in a RAID 0 volume are striped across all the drives in the volume in
order. There is no parity data, so RAID 0 uses the full capacity of the drives. There is,
however, no redundancy. If a single drive fails, all data on the volume is lost.
order. There is no parity data, so RAID 0 uses the full capacity of the drives. There is,
however, no redundancy. If a single drive fails, all data on the volume is lost.
RAID 1
Each data block in a RAID 1 volume is mirrored on two drives. If one of the
mirrored pair fails, the data from the other drive is used. Because the data is
mirrored in a RAID 1 configuration, the volume has only half the capacity of the
assigned drives. For example, if you create a 4-drive RAID 1+0 volume with
18-Gbyte drives, the resulting data capacity is 4 x 18 / 2 = 36 Gbytes.
mirrored pair fails, the data from the other drive is used. Because the data is
mirrored in a RAID 1 configuration, the volume has only half the capacity of the
assigned drives. For example, if you create a 4-drive RAID 1+0 volume with
18-Gbyte drives, the resulting data capacity is 4 x 18 / 2 = 36 Gbytes.
RAID 5
In a RAID 5 configuration, data is striped across the drives in the volumes in
segments, with parity information being striped across the drives, as well. Because
of this parity, if a single drive fails, data can be recovered from the remaining drives.
Two drive failures cause all data to be lost. A RAID 5 volume has the data capacity
of all the drives in the logical unit, less one. For example, a 5-drive RAID 5 volume
with 18-Gbyte drives has a capacity of (5 - 1) x 18 = 72 Gbytes.
segments, with parity information being striped across the drives, as well. Because
of this parity, if a single drive fails, data can be recovered from the remaining drives.
Two drive failures cause all data to be lost. A RAID 5 volume has the data capacity
of all the drives in the logical unit, less one. For example, a 5-drive RAID 5 volume
with 18-Gbyte drives has a capacity of (5 - 1) x 18 = 72 Gbytes.