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RTM-ATCA-SXXX Overview
6806800H62B ATCA‐S201InstallationandUseGuide62
Hardware RAID
configuration
Description
Section 1 — Create RAID
volumes
List of remaining disks available for new RAID volume definition.
Click to select disk members.
Click to select RAID level
Click create Volume
Upon completion, the physical disk view will change to display the new
Virtual RAID volume while its disk members become hidden.
Section 2 —RAID Status
Summary
Provides a detailed status of existing RAID volumes, and details regarding
the “hidden” disk members.
Click “delete” to erase this volume and return all of the member disks to the
pool of available disks.
Section 3 — Allocate Hot Spare List of disks available for new global hot spare. The ATCA-S201 will use a
global hot spare to repair a RAID1 or RAID1E volume that is degraded.
Section 4- Hot spare status Provides a detailed status of existing global hot spares. Click “delete” to
return a spare disk to the pool of available disks.
Understanding the Hardware RAID status table page
Once the RAID volume is created, the individual disks comprising a RAID disk are
“hidden” from the OS and physical disk view, but are shown in the RAID status table.
Parameter Description
Volume The ATCA blade is label string identifies the RAID volume.
Bus/Target Identifies the SCSI parameters used to address the virtual RAID device
Type Identifies the RAID level employed by the virtual RAID device. (Raid0,
Raid1, or Raid1E)
WWID The World-Wide Identification, is an eight byte SAS address that
uniquely identifies the virtual RAID volume.
Optimal — The RAID volume and all comprising disk members are fully
operational
Degraded - The RAID volume is accessible for read/write operation,
but one of its underlying disk members is offline.
State
Failed - the RAID volume is not accessible for read/write operations.
Data loss may have occurred.
Enabled (default) — The RAID volume is able to receive I/O commands Status
Offline — The RAID volume cannot receive I/O
Size The usable capacity, (MB) of the Virtual RAID drive.
Stripe Size The maximum chunk of data that is written to one disk of a RAID
group. The stripe width = Stripe size * number of disks. The ATCA-
S201 currently applies a fixed size of 64 KB.