Adaptec 2820SA User Guide - Page 17

Standard RAID Controller Features, Array-level Features, Advanced Data Protection Suite - stripe size

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Chapter 3: About Your RAID Controller ● 17 Standard RAID Controller Features ● Flash ROM for updates to controller firmware, BIOS, and the Adaptec RAID Configuration utility ● Disk drive hot-swapping ● Event logging and broadcasting including email and SNMP messages ● Multiple options for creating and managing RAID arrays-A full software application (Adaptec Storage Manager), a BIOS-based utility, a command line utility, and a DOS utility. See Managing Your Storage Space on page 52 for more information. ● (SAS and SATA RAID controllers only) Native command queuing (NCQ), which lets disk drives arrange commands into the most efficient order for optimum performance ● (SAS and SCSI RAID controllers only) Support for disk drive enclosures with SAF-TE enclosure management hardware ● (SAS RAID controllers only) Support for disk drive enclosures with SES2 enclosure management hardware Some RAID controllers support a battery backup module (see page 18). Array-level Features Note: For more information, refer to the Adaptec Storage Manager User's Guide or online Help. ● Support for RAID 0, RAID 1, RAID 5, RAID 10, RAID 501, simple volumes, and spanned volumes ● Support for hot spares (global and dedicated) ● Support for automatic failover, so arrays are automatically rebuilt when a failed disk drive is replaced (applies to redundant arrays in SES2- or SAF-TE-enabled disk drive enclosures only) ● Optimized disk utilization, which ensures that the full capacity of all disk drives can be used, even if the disk drives vary in size ● Online capacity expansion, so you can increase the capacity of an array without recreating it ● Support for array migration from one RAID level to another Advanced Data Protection Suite ● Copyback Hot Spare-You can use this feature to move data from a hot spare back to its original location after a failed disk drive is replaced. ● Striped Mirror (RAID 1E)-A RAID 1 Enhanced array is similar to a RAID 1 array except that data is both mirrored and striped, and more disk drives can be included. ● Hot Space (RAID 5EE)-A RAID 5EE array is similar to a RAID 5 array except that it includes a distributed spare and must be built from a minimum of four disk drives. ● Dual Drive Failure Protection (RAID 6)-A RAID 6 array is similar to a RAID 5 array except that it includes two independent sets of parity data instead of one. ● Dual Drive Failure Protection (RAID 601)-A RAID 60 array is similar to a RAID 50 array except that it includes four independent sets of parity data instead of two. 1 The Adaptec 2420SA RAID controller does not support RAID 50 or RAID 60.

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Chapter 3: About Your RAID Controller
●
17
Standard RAID Controller Features
●
Flash ROM for updates to controller firmware, BIOS, and the Adaptec RAID
Configuration utility
●
Disk drive hot-swapping
●
Event logging and broadcasting including email and SNMP messages
●
Multiple options for creating and managing RAID arrays—A full software application
(Adaptec Storage Manager), a BIOS-based utility, a command line utility, and a DOS
utility. See
Managing Your Storage Space
on page 52
for more information.
●
(SAS and SATA RAID controllers only)
Native command queuing (NCQ), which lets disk
drives arrange commands into the most efficient order for optimum performance
●
(
SAS and SCSI RAID controllers only
) Support for disk drive enclosures with SAF-TE
enclosure management hardware
●
(
SAS RAID controllers only
) Support for disk drive enclosures with SES2 enclosure
management hardware
Some RAID controllers support a battery backup module (see
page 18
).
Array-level Features
Note:
For more information, refer to the
Adaptec Storage Manager User’s Guide
or online Help.
●
Support for RAID 0, RAID 1, RAID 5, RAID 10, RAID 50
1
, simple volumes, and spanned
volumes
●
Support for hot spares (global and dedicated)
●
Support for automatic failover, so arrays are automatically rebuilt when a failed disk drive is
replaced (applies to redundant arrays in SES2- or SAF-TE-enabled disk drive enclosures
only
)
●
Optimized disk utilization, which ensures that the full capacity of all disk drives can be
used, even if the disk drives vary in size
●
Online capacity expansion, so you can increase the capacity of an array without recreating it
●
Support for array migration from one RAID level to another
Advanced Data Protection Suite
●
Copyback Hot Spare
—You can use this feature to move data from a hot spare back to its
original location after a failed disk drive is replaced.
●
Striped Mirror (RAID 1E)
—A RAID 1 Enhanced array is similar to a RAID 1 array except
that data is both mirrored
and
striped, and more disk drives can be included.
●
Hot Space (RAID 5EE)
—A RAID 5EE array is similar to a RAID 5 array except that it
includes a distributed spare and must be built from a minimum of four disk drives.
●
Dual Drive Failure Protection (RAID 6)
—A RAID 6 array is similar to a RAID 5 array
except that it includes
two
independent sets of parity data instead of one.
●
Dual Drive Failure Protection (RAID 60
1
)
—A RAID 60 array is similar to a RAID 50 array
except that it includes
four
independent sets of parity data instead of two.
1
The Adaptec 2420SA RAID controller does not support RAID 50 or RAID 60.