Product guide

30
Symmetrix Fibre Channel with Qlogic HBAs on UnixWare 7
Fabric Configurations
Changing System
Configuration File
Settings
Setup Checklist step 7
SCO Unixware 7.1.1 defaults to reserve devices for specific HBAs.
This poses a problem when sharing such Symmetrix devices as VCM
databases with more than one HBA. To ensure proper host
performance, modify the variable sd01_do_reserve in
/etc/conf/pack.d/sd01/space.c to equal 0 and disable disk
reservations:
int sd01_do_reserve = 0;
For changes to take effect, you must save changes, then rebuild the
kernel and reboot the system:
1. Type cd /etc/conf/bin ENTER.
2. Type
./idbuild -B ENTER.
3. Type
./idcpunix ENTER.
4. Reboot the system.
UnixWare 7
Conventions and
Persistent Binding
Information
Setup Checklist step 8
This section contains some pertinent information you should read
and understand before configuring the driver
/etc/conf/pack.d/qlc2200/space.c file.
Understanding Disk
Device File Names
Setup Checklist step 8a
To better understand setting up a Symmetrix device, review the SCSI
disk naming conventions. Raw disk device filenames take two forms:
• /dev/rdsk/cCbBtTdDsS
• /dev/rdsk/cCbBtTdDpP
where:
• C is the occurrence of the host adapter board.
• B is the port designation for the specific HBA. (For a single-port
HBA, this value is 0.)
• T is the SCSI target ID. The Qlogic driver supports up to 32
targets per channel.
• D is the logical unit number (LUN) of the disk device. For a Fibre
Channel HBA, there can be up to 32 LUNs per target.
• S is the disk slice number. For any SCSI or Fibre Channel device, S
is in the range 0 through 184. The default number of slices is in
the range 0 through 15. Slice 0 always denotes the entire disk.