General Controller Settings

Note: Default settings are shown in bold type.

Option

Description

Drive's Write Cache

When set to Enable All, write cache is enabled on all disk drives on the controller. (Enabling the write cache overrides any individual drive settings in maxView Storage Manager.) When set to Disable All, write cache is not used on the disk drives. When set to Drive Specific, write cache is enabled/disabled on a per-drive basis in maxView Storage Manager.
CAUTION:
When write cache is enabled, there is a slight possibility of data loss or corruption during a power failure.

Runtime BIOS

When enabled, the controller BIOS allows the controller to act as a bootable device. Disabling the BIOS allows another controller to act as a bootable device.

Automatic Failover

When enabled, the controller automatically rebuilds an array when a failed disk drive is replaced. When disabled, the array must be rebuilt manually.

Array Background Consistency Check

When enabled, the controller constantly verifies a redundant array. Note that there may be a significant performance reduction. Default is disabled.

Array-based BBS Support

When enabled in systems that support BBS, the controller presents attached bootable devices up to the BIOS for boot device selection. This is relevant for logical arrays. Default is disabled.

SATA Native Command Queuing (NCQ)

When enabled, NCQ is enabled. Only available with SATA II disk drives.

Physical Drives Display During POST

When enabled, connected disk drives are displayed during system Power On Self Test (POST). Displaying the disk drives adds a few seconds to the overall POST time. Default is disabled.

DVD/CD-ROM Boot Support

When enabled, the system can be booted from a bootable DVD/CD. (This setting is not available on all RAID controller models.)

Removable Media Devices Boot Support

When enabled, removable media devices, such as CD drives, are supported. (This setting is not available on all RAID controller models.)

Alarm Control

When enabled, the alarm sounds. Default is enabled.

Note: When the alarm is turned off (disabled), it will remain off after a reboot.

Default Background Task Priority

Sets the default priority for background tasks on the controller (such as logical drive creation) to High, Medium, or Low. Default is High.
Note: This setting applies to new tasks. It does not affect currently running tasks.

LED Indication Mode

When set to Activity and Fault, the drive activity LEDs blink to indicate I/O activity (randomly depending on I/O load) and fault (steady 1Hz). When set to Fault Only, the drive activity LEDs blink to indicate fault state only. For Series 6/6E controllers, default is Fault Only.

Backplane Mode

Adaptec Series 6 Controllers (except Series 6E/6T):

When set to Auto, controller automatically detects backplane signal type: I2C or SGPIO. To set the backplane mode explicitly select SGPIO, I2C, or Disabled. Default is Auto.

Adaptec Series 7, Series 8, and Series 6E/6T Controllers:

When set to Default, controller automatically sets the backplane mode to IBPI. To set the backplane mode explicitly, select IBPI, SGPIO, or Disabled. Default is IBPI.

Note: With the default IBPI setting, the firmware sends a SGPIO "Backplane_TYPE" signal if it recognizes that a SGPIO Backplane is connected. If any connected SGPIO backplane does not support the "Backplane_TYPE" signal, or it does not support the IBPI protocol, you can manually set the Backplane Mode to "SGPIO".

Selectable Performance Mode

When set to Dynamic, performance criteria adjusts automatically based on controller usage, RAID level, and disk drive type. When set to OLTP/Db, performance criteria is optimized for transaction-oriented applications, such as data entry and retrieval. When set to Big Block Bypass, DRAM write cache is bypassed based on IO write size; performance criteria is optimized for serving Web pages, file serving, and data retrieval. When set to User Defined, you are prompted to use the OS tools to set individual parameters (contact Adaptec support for more information). Default is Dynamic.

Controller Mode

Adaptec Series 7 and Adaptec Series 8 Controllers Only:

Adaptec controllers support four operating modes: RAID: Expose RAW mode, Auto Volume mode, HBA mode, and RAID: Hide RAW mode.

  • When set to RAID: Expose RAW mode, all RAID functions of the controller are enabled. Attached drives without Adaptec meta-data are surfaced to the host operating system as RAW Pass Through devices (similar to JBODs on legacy Adaptec controllers).
  • When set to Auto Volume Mode, RAID functions of the controller are enabled. Attached drives without Adaptec meta-data, but with an OS partition, are surfaced to the host operating system as RAW devices, where the RAID layer of the controller firmware is bypassed when the host issues commands to the device. Attached drives without Adaptec meta-data and without OS partitions, are automatically configured as Simple Volumes (single drives with Adaptec meta-data). Auto Volume Mode enables DRAM caching on rotating media to help reduce latency and accelerate performance.
  • When set to HBA Mode, attached drives are surfaced as RAW devices. The intent of this mode is to allow the RAID controller to act and be used as an HBA. Changing into HBA mode is allowed only if there are no drives with Adaptec meta-data attached to the controller (see Uninitializing Disk Drives for more information). Uninitialized drives are compatible with any HBA and can be exchanged with drives on the motherboard's SATA interface.
  • When set to RAID: Hide RAW mode, all RAID functions of the controller are enabled, but RAW devices are not exposed to the operating system.
Default is RAID: Expose RAW mode.

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