| T.R | Title | User | Personal
Name | Date | Lines |
|---|
| 887.1 | | SSDEVO::T_GONZALES | | Tue May 27 1997 14:08 | 17 |
| The host port target id's can be any target id's that are not in use.
The rule of thumb is that the scsi adapters on the host systems should
use the higher target id's. The host part target id's would have
nothing to do with whether the hsz's can see any of the disks on its
ports, those host port target id's would affect the ability of the host
systems to see "units" on the hsz's; units being any storage
containers, raid5, mirror, stripe, jbods, etc.
As far as termination on the hsz ports, if you have ba356 shelves and
personality modules, the personality modules have the termination,
unless you put the shelves in a split bus mode, or you plug another
cable into the "b" connector on the personality module.
If you have ba350 shelves then the termination is supplied by
terminator modules on the back of the shelf. See ba350 users guides
|
| 887.2 | | MSE1::PCOTE | press one now for personal name | Wed May 28 1997 12:50 | 13 |
|
> The HSZ50 only had one target id setup (id6) Host ID was 6 also.
> So I recommended they setup the HSZ40 to use all 4 possible target
> ID's since it is not in a dual-redundant configuration. So that was
NT Cluster configurations typically have the two SCSI controllers
configured with Host IDs 6 and 7. From above, it appears that you
are also using host ID 6 as one of the possible Host IDs on the
hsz50. Generally, Host IDs 0 through 3 are used for the HSZ.
Since you're using Windows NT, it would be prudent to verify
the the HSZ is configured with HOST_FUNCTION_ID set to
"D" and that the HSZDISK SCSI class driver is installed.
|
| 887.3 | followup | KAOT01::B_CORBIN | dtn 640-7420 | Wed May 28 1997 19:55 | 25 |
| Thanks for the replys..
I want to followup on one issue to make sure I understand.
The hsz50 configuration manual also states that the HSZ50
can declare up to 4 target ID's that are not already being used on the
host SCSI bus.
From what I was told the customer had used a target
id of 6. The host bus had 2 Alphaservers 4100 using KZPSA's with
host bus id' of 5 and 7. The host bus Id of the HSZ50 was 6.
So they have a conflict between the host bus id of 6 and the
target ID of 6. What are the issues here? It does appear
to be functional. The site currently has 2 target ids defined
(0,6)
Also are the HSZ50/40 controller slots hard wired for SCSI id's
6 and 7? On this customers site they have a Host Id 7 taken by
a KZPSA. So this could be a future problem if a second HSZ50
were installed without checking the host bus.
Brian
|
| 887.4 | You are confusing the host side with the device side | SSDEVO::RMCLEAN | | Wed May 28 1997 20:13 | 3 |
| The host Id's are NOT hardwired! You are confusing the HSZ device bus with the
Host bus. In a dual controller pair the Device bus HSZ's are 6 & 7. For the
host side you can configure them with CLI.
|
| 887.5 | | SSDEVO::T_GONZALES | | Thu May 29 1997 21:18 | 8 |
| The basic rule: Don't use scsi id's that are not being used.
Normally the kzpsa adapters on the host systems get the high target
id's, however since the target id's can be set by software there are
no "enforcers" to make sure that the host systems get the high id's.
If the scsi adapters on the host systems are set to 5 and 7,the
hsz id's can include up to four id's selected from 0,1,2,3,4 or 6.
|
| 887.6 | | SSDEVO::T_GONZALES | | Fri May 30 1997 14:44 | 6 |
| the last note needs be corrected;
basic rule of thumb: Only use id's that are not already assigned !
sorry,
|
| 887.7 | A block diagram helps | KAOT01::B_CORBIN | dtn 640-7420 | Sun Jun 01 1997 21:37 | 28 |
| re: .4
Yes I was a bit confused between the SCSI target ID's and the
HSZ device ID's . I found it helped to draw a simple block diagram.
Thanks for you assistance.
Brian
Device Scsi Bus HSZxxx Dual Redundant Pair
Fast wide Single ended
SCSI ID's 0-5 _________________
0 1 2 3 4 5 --<|6 |7 |
| | |
0 1 2 3 4 5 --<|6 |7 |
| | |
0 1 2 3 4 5 --<|6 |7 |
| | |
0 1 2 3 4 5 --<|6 |7 | KSPSA KSPSA
| | | __________ __________
0 1 2 3 4 5 --<|6 |7 | |HOST SCSI| |HOST SCSI|
| | | |_ID 6 ___| |__ID 7___|
0 1 2 3 4 5 --<|6 |7 | | |
| | | | |
_________________ | |
|_______^________|-------------- |
| |
|Target id's for host bus (0,1,2,3) |
|---------------------------------------------|
differental scsi bus ( fast wide)
|