Adaptec ASR-5085 Information Sheet page 7

4.15 Linux Cache Synchronization
With Linux driver 1.1-5-2459 (or higher), you may see an improvement
in performance if you suppress cache synchronization. For a
controller with battery back-up, add 'options aacraid cache=6' to
the /etc/modprobe.conf.local file. To completely suppress cache
synchronization, add 'options aacraid cache=2'. Then, reboot.
Note that the smaller value provides no protection in case of a
power outage.
4.16 Listing Devices in VMware ESX 4.x Console
After deleting an array with ARCCONF, the VMware ESX Console
will hang if you list devices with the 'fdisk -l' command.
As a work-around, rescan first, then try 'fdisk -l'.
4.17 BIOS Hangs When Booting RAID Controller with Batteryless Backup (ZMCP)
Possible Causes: After a system shutdown, the ZMM-100DB daughterboard
remains active for several minutes. The Super Cap connector may have
been improperly removed and/or re-inserted with a charge still present.
Solution: Plug the Super Cap connector in when the system is off
and, if the yellow activity LED is illuminated on the ZMM-100DB
daughterboard attached to RAID Controller, wait for the LED
activity indicator to go out. This may take several minutes.
The system should then boot normally.
4.18 Updating Firmware on Hitachi HUS1514xxVLS300 SAS Drives
Firmware upgrade on Hitachi HUS151473VLS300 and HUS151436VLS300
SAS drives is not supported for packet sizes below 4K (512/1024/2048).
4.19 Installing Windows OS from Direct-Attached Non-DASD Device
Adaptec RAID controllers do not support Windows OS installation from
direct-attached Non-DASD devices ("Direct Access Storage Devices"),
such as a tape drive, CD-ROM, or DVD-ROM. Adaptec recommends
using a motherboard IDE or SATA DVD-ROM/CD-ROM device to install
the Windows OS on a RAID array.
4.20 maxCache SSD Cache Performance
The maxCache cache contents is lost if the OS is not shut down
cleanly (for example, by pressing the reboot button or
pulling the power). When the system is restarted, the cache
is rebuilt. Until that time, you may see a temporary loss
in performance.
4.21 Exceeding 2TB LUN Size on VMware ESX Server
Under VMware, if you create a logical drive with greater than
2TB of capacity, the OS will only be able to access the remaining
storage above 2TB. For instance, with the 3.5TB LUN, only
1.5TB will be accessible; with a 5TB LUN, only 1TB will
be accessible (first 2TB+2TB are skipped); and so on.
4.22 PHY Rate Limitations on Western Digital Hard Drives
To avoid data-phase errors with certain Western Digital hard
drives attached to Adaptec Series 5 controllers, the PHY rate
must be set 1.5Gb/s rather than the maximum rate of 3.0Gb/s.
o For Western Digital WD2002FYPS and WD20EADS hard drives, the
PHY rate is set automatically to 1.5Gb/s.
o You can set the PHY rate manually to Auto (default),
1.5Gb/s, or 3.0Gb/s in the BIOS utility.
NOTE: For Adaptec low-port RAID controllers, the device
properties in ASM and the BIOS utility will continue
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