cause the system to hang with an EXT4 error when a good drive
is removed from a rebuilding array. Use these commands to
increase the timeout in SYSFS, assuming /dev/sda, /dev/sdb,
and /dev/sdc are the device LUNs on the Ubuntu Linux host:
echo ``90``> /sys/block/sda/device/timeout
echo ``90``> /sys/block /sdb/device/timeout
echo ``90``> /sys/block/sdc/device/timeout
3.11 Adaptec maxCache and maxCache Plus Setup
o Adaptec maxCache is supported on Adaptec Series Q controllers
only. maxCache Plus is supported on Adaptec Series 8Q/8ZQ
controllers only. See the maxView Storage Manager Readme for
maxCache Plus requirements and setup instructions.
o The maximum number of SSDs that you can install on a
controller for maxCache applications is:
7805Q/71605Q: up to 8 SSDs, with 2TB total capacity
8885Q/81605ZQ: up to 8 SSDs, with 2TB total capacity
See www.adaptec.com/compatibility for a list of
maxCache-compatible SSD drives.
3.12 Dual Firmware Flash Image Support
Adaptec Series 7 and Adaptec Series 8 controllers support
active and passive firmware images. Built-in logic determines
the "right time" to update from passive to active, either at
shutdown or boot up, and is designed to protect against image
corruption or data loss due to power failure during image update.
If the update occurs in the boot path, a server reboot is
expected. Additionally, you must be running the latest drivers.
NOTE: This feature is enabled only when upgrading from and to a
firmware version that supports dual firmware images. For
customers upgrading from an Adaptec release prior May 2013
(specifically, Firmware Version 7.2.0, Build 30260), there
is no change in behavior. The firmware image is updated in
one stage.
3.13 Adaptec Flash Utility (AFU) Support
Adaptec Series 8 controllers do not support the DOS-based
Adaptec Flash Utility (described in the user's guide). To
flash a Series 8 controller, use the uEFI BIOS, ARCCONF,
maxView Storage Manager, or the maxView Storage Manager
bootable USB image.
--------------------------------------------------------------------
4. Known Limitations
4.1 Linux Boot Device
Regardless of which device you select to install the OS, the
boot record is always written to Device 0. As a result,
Linux will fail to boot if you delete or swap away Device 0.
For example, if you create three arrays in the BIOS--VOL-0,
VOL-1, and VOL-2--install the OS on VOL-1, then swap VOL-0
and VOL-2, Linux will fail to boot. Restore the original
array sequence and Linux boots normally. Ideally, you should
always install on Device 0.
4.2 OS Installation with RAW Devices
With Adaptec Series 7 and Adaptec Series 8 controllers, installing
the OS in a mixed configuration with RAID Arrays and RAW devices
is not supported.
WORKAROUND: Remove the RAW devices, install the OS on the RAID
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