Novell NETWARE 6-DOCUMENTATION Manual page 785

is created. If block suballocation has been disabled, enable it in
ConsoleOne when you create a partition. For information about
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enabling block suballocation, see Creating a Partition in the Novell
Storage Services Administration Guide. Once block suballocation is
enabled, you cannot disable the feature without recreating the volume.
If you use block suballocation, set your file block size to 64 KB. The
larger block size causes the system to transfer more data at one time so it
improves performance.
Keep at least 1000 free blocks on each NetWare volume that has
suballocation enabled. Free blocks are disk blocks that have no files
stored in them. If the number of free blocks is low, the suballocation will
increase server utilization.
To find the number of free blocks, in MONITOR select Available Options
> Volumes. Select the name of the volume you want. Press Tab to expand
the information window and note the value of the Free Blocks statistic.
For instructions on using MONITOR, see MONITOR in Utilities
Reference.
You can save partition space and increase performance by eliminating the
Hot Fix redirection area on a partition. However, once Hot Fix is
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eliminated from a partition, you cannot add it again without first deleting
the volumes on the partition. Once Hot Fix is gone, the partition will no
longer be fault tolerant, unless the hard disk itself provides a means of
fault tolerance. Data on corrupted sectors of the disk won't be redirected
to the Hot Fix redirection area. In addition, you will not be able to mirror
the partition.
Turn off Read-After-Write-Verify in MONITOR. For instructions on
using MONITOR, see MONITOR in Utilities Reference.
Read-After-Write-Verify is almost always provided by the hard disk
itself. Use the Read-After-Write-Verify feature in MONITOR only if your
hardware does not provide this feature but does support software-
controlled Read-After-Write-Verify.
See "Turning Off Read-After-Write Verification" on page 28.
If you have a 16-bit disk adapter, make sure you increase the number of
reserved buffers below 16 MB. Use the SET command or MONITOR to
set the parameter Reserved Buffers Below 16 MB to its upper limit, 300.
The parameter is found in MONITOR > Available Options > Server
Parameters > Memory. Remember that too many reserved buffers can
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NetWare Server Disks and Storage Devices Administration Guide