HPE GreenLake Administration
- Community Home
- >
- Storage
- >
- Legacy
- >
- Disk
- >
- SCSI resets on SC10 disks
Disk
1830938
Members
1710
Online
110017
Solutions
Forums
Categories
Company
Local Language
back
Forums
Discussions
Forums
- Data Protection and Retention
- Entry Storage Systems
- Legacy
- Midrange and Enterprise Storage
- Storage Networking
- HPE Nimble Storage
Discussions
Forums
Discussions
Discussions
Discussions
Forums
Discussions
back
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
- BladeSystem Infrastructure and Application Solutions
- Appliance Servers
- Alpha Servers
- BackOffice Products
- Internet Products
- HPE 9000 and HPE e3000 Servers
- Networking
- Netservers
- Secure OS Software for Linux
- Server Management (Insight Manager 7)
- Windows Server 2003
- Operating System - Tru64 Unix
- ProLiant Deployment and Provisioning
- Linux-Based Community / Regional
- Microsoft System Center Integration
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Blogs
Information
Community
Resources
Community Language
Language
Forums
Blogs
Topic Options
- Subscribe to RSS Feed
- Mark Topic as New
- Mark Topic as Read
- Float this Topic for Current User
- Bookmark
- Subscribe
- Printer Friendly Page
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
07-22-2001 11:37 PM
07-22-2001 11:37 PM
SCSI resets on SC10 disks
Hello,
I have a cluster of L-class boxes. We have a couple of SC10 disk arrays attached. We're running HP-UX 11.0 and MC/ServiceGuard. We keep on receiving one or two SCSI reset messages every day in the syslog file. We can't tie them to a specific time or after a specific command - they seem to be random. We've had these for about 4 months now. They don't seem to affect the system's performance but the system isn't live yet so it's hard to tell.
We replaced the SC10 backplanes, the BCC's, we installed self-terminating SCSI cables (the black ones - they helped a lot but we're still getting the messages), SCSI controllers. But we still get these resets. I'm concerned that they will impact on the I/O performance once the system goes live as it will be heavily loaded.
Incidentailly, an ioscan works fine.
Anyone else getting these? I installed another cluster on D's with storage enclosures and I don't get the resets. I'm wondering if it's an SC10 problem. Or if it's a problem at all.
I have a cluster of L-class boxes. We have a couple of SC10 disk arrays attached. We're running HP-UX 11.0 and MC/ServiceGuard. We keep on receiving one or two SCSI reset messages every day in the syslog file. We can't tie them to a specific time or after a specific command - they seem to be random. We've had these for about 4 months now. They don't seem to affect the system's performance but the system isn't live yet so it's hard to tell.
We replaced the SC10 backplanes, the BCC's, we installed self-terminating SCSI cables (the black ones - they helped a lot but we're still getting the messages), SCSI controllers. But we still get these resets. I'm concerned that they will impact on the I/O performance once the system goes live as it will be heavily loaded.
Incidentailly, an ioscan works fine.
Anyone else getting these? I installed another cluster on D's with storage enclosures and I don't get the resets. I'm wondering if it's an SC10 problem. Or if it's a problem at all.
3 REPLIES 3
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
07-23-2001 06:50 AM
07-23-2001 06:50 AM
Re: SCSI resets on SC10 disks
Can you post up the info about the dial switch settings on your SC10 and the ioscan output.
As you mentioned SCSI is very touchy about correct termination, make sure the terminator is correct for the SC10.
An swlist or a what /stand/vmunix should show the SCSI driver revision, which should be updated to latest level. I do recall fixes in scsi reset notification.
I have often seen these errors appear on my system, typically related to power and/or lvm but rarely hardware defects.
When was the last time you patched your systems, and what firmware is on the SC10 bccs?
mstm - tools - info - run.
You can find patch info here on the itrc.
Later;
Bill
As you mentioned SCSI is very touchy about correct termination, make sure the terminator is correct for the SC10.
An swlist or a what /stand/vmunix should show the SCSI driver revision, which should be updated to latest level. I do recall fixes in scsi reset notification.
I have often seen these errors appear on my system, typically related to power and/or lvm but rarely hardware defects.
When was the last time you patched your systems, and what firmware is on the SC10 bccs?
mstm - tools - info - run.
You can find patch info here on the itrc.
Later;
Bill
It works for me (tm)
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
07-24-2001 04:55 AM
07-24-2001 04:55 AM
Re: SCSI resets on SC10 disks
The D-series and JAMAICA's use fixed termination.
The N & L series have Auto Terminating Host bus adapters. In a service Guard configuration Auto-Termination MUST be turned off and self-terminating cables MUST be used. If two auto-terminating interfaces are attached to the same SCSI bus they get confused about whether to terminate or not.
Also make sure the Host bus adapters are set to different SCSI addresses (7 & 6 for example) I've seen a lot of people forget to do this.
On Fast wide differential, if you forget it won't even boot, but with LVD and the SC10 it will boot and then you get resets as the two interfaces contend for ownership of the bus.
While you are turning Auto-termination OFF and checking the HAB?s SCSI id, check the interface speed and make sure it?s set to UNLIMITED (for the SC-10)
The N & L series have Auto Terminating Host bus adapters. In a service Guard configuration Auto-Termination MUST be turned off and self-terminating cables MUST be used. If two auto-terminating interfaces are attached to the same SCSI bus they get confused about whether to terminate or not.
Also make sure the Host bus adapters are set to different SCSI addresses (7 & 6 for example) I've seen a lot of people forget to do this.
On Fast wide differential, if you forget it won't even boot, but with LVD and the SC10 it will boot and then you get resets as the two interfaces contend for ownership of the bus.
While you are turning Auto-termination OFF and checking the HAB?s SCSI id, check the interface speed and make sure it?s set to UNLIMITED (for the SC-10)
Plan for the future and tomorrow will take care of itself.
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
11-12-2005 12:26 PM
11-12-2005 12:26 PM
Re: SCSI resets on SC10 disks
For Bob,
How would be check if Auto-termination is turned off? I am experiencing a similar problem.
Thanx :)
How would be check if Auto-termination is turned off? I am experiencing a similar problem.
Thanx :)
The opinions expressed above are the personal opinions of the authors, not of Hewlett Packard Enterprise. By using this site, you accept the Terms of Use and Rules of Participation.
Company
Events and news
Customer resources
© Copyright 2025 Hewlett Packard Enterprise Development LP