Communicator e3000 MPE/iX Release 7.5 (Software Release C.75.00) (30216-90336)

Chapter 5
Technical Articles
IODFAULT Generic Device IDs
122
IODFAULT Generic Device IDs
by Larry Nichoalds, CSY Labs
Starting with MPE release 7.5, generic device ids have been added to the IODFAULT file to help facilitate the
configuration of I/O devices.
The generic IDs are particularly useful for configuring disks, since they tend to change every few months and
their respective IDs tend to be quite cryptic. Now they need only be identified as the disk type category.
For disk there are three different types: LVDDISK, HVDDISK, SEDISK.
For all disk arrays, use HPDARRAY. Products, such as, DVD, CDROM, and UPS can be configured by simply
using the appropriate generic name.
Tape devices fall into one of two categories; i.e., DDS or DLT (non-DDS) tape products.
The following is the complete generic id list that is located at the end of the IODFAULT file:
{--------------------------------------------------------------------------}
{ G E N E R I C D E V I C E I D s }
{--------------------------------------------------------------------------}
{ ********** Single-Ended Disk ********** }
SEDISK DISC 4 2 0128 SCSI_DISC_DM LOGICAL_DEVICE_MANAGER 0008 NONE NONE &
DISC+SPOOL 0 DA 0 FALSE FALSE
{ ********** Fast_Wide (HVD) Disk ********** }
HVDDISK DISC 4 2 0128 SCSI_DISK_AND_ARRAY_DM LOGICAL_DEVICE_MANAGER 0008 &
NONE NONE DISC+SPOOL 0 DA 0 FALSE FALSE
{ ********** LVD Disk ********** }
LVDDISK DISC 4 2 0128 SCSI_DISK_AND_ARRAY_DM LOGICAL_DEVICE_MANAGER 0008 &
NONE NONE DISC+SPOOL 0 DA 0 FALSE FALSE
{ ********** Fibre_Channel Disk ********** }
FCDISK DISC 4 2 0128 SCSI_DISK_AND_ARRAY_DM LOGICAL_DEVICE_MANAGER 0008 &
NONE NONE DISC+SPOOL 0 DA 0 FALSE FALSE
LVDDISK low-voltage
differential disks
Used on A and N class machines associated with the A5149A and
A5150A adaptor cards
HVDDISK high-voltage
differential disks
Used primarily on Hawk platforms, but are also available on A and N
class machines using an HVD card; e.g., A4800A or A5159A
SEDISK single-ended disks Used mainly by Hawk platforms, but could be used on an A and N
class machine using an LVD bus. However if SE disks are used on an
LVD bus and other LVD devices exist on the same bus, the
performance of the LVD devices is limited by the SE device(s)