Supported Local Disk Configurations
The software gateway supports systems with 1 to 6 disks. The number of disks
available during installation affects the level of fault tolerance and
performance that can be obtained. The table below describes the way the
installer provisions storage for each of the supported disk
configurations.
Note -
The installer automatically sets up a software RAID configuration if it
detects more than one disk. If your system is using a hardware RAID
controller, then the RAID volume should appear to the installer as a single
disk device to avoid two levels of mirroring, which would negatively affect
write performance.
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1
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1 TB
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All storage on a single disk
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None
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s
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2
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1 TB
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RAID 1 (mirror)
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Can survive a single drive failure.
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s
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3
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1 TB
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RAID 1 (mirror or disks 1 and 2) plus disk 3 used for
backups
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Can survive a single drive failure.
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s
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4
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1 TB
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RAID 10 (mirror on disks 1 and 2, mirror on disks 3 and 4,
striped across the 2 mirrored sets)
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Can survive 1 disk failure in each mirror set. For
example: this configuration can survive a failure of disks 1
or 2 and 3 or 4, but not 1 and 2 or 3 and 4.
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2 x s
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5
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1 TB
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RAID 10 (mirror on disks 1 and 2, mirror on disks 3 and 4,
striped across the 2 mirrored sets) plus disk 5 used for
backups.
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Can survive one disk failure in each mirror set and one
additional failure.
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2 x s
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6
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1 TB
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RAID 10 (mirror on disks 1 and 2, mirror on disks 3 and 4,
striped across the 2 mirrored sets) plus RAID 1 (mirror on
disk 5 and 6) for backups.
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Can survive one disk failure in each mirror set. Backup
disk can be used to recover database should an entire mirror
fail.
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2 x s
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