- Community Home
- >
- Storage
- >
- Entry Storage Systems
- >
- Disk Enclosures
- >
- Re: Auto RAID 12h: Performance
Categories
Company
Local Language
Forums
Discussions
Forums
- Data Protection and Retention
- Entry Storage Systems
- Legacy
- Midrange and Enterprise Storage
- Storage Networking
- HPE Nimble Storage
Discussions
Discussions
Discussions
Forums
Forums
Discussions
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
Discussion Boards
Discussion Boards
Community
Resources
Forums
Blogs
- 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
тАО04-01-2003 08:15 AM
тАО04-01-2003 08:15 AM
Auto RAID 12h: Performance
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО04-01-2003 08:28 AM
тАО04-01-2003 08:28 AM
Re: Auto RAID 12h: Performance
Check if 12h is healthy - simply from its control panel. Check if bus is properly terminated and cables are ok, not exceeding its lenghts (max 25m as whole bus). There're no devices on the bus which can load bus preventing 12h of winning SCSI bus arbitration
Eugeny
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО04-01-2003 09:12 AM
тАО04-01-2003 09:12 AM
Re: Auto RAID 12h: Performance
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО04-01-2003 09:33 AM
тАО04-01-2003 09:33 AM
Re: Auto RAID 12h: Performance
- 'arraydsp -a'
- 'ioscan -fn'
- 'logprint'
Bus termination rule is simple: bus should be terminated at both ends with correct type of terminators: in your case HVD ones
Eugeny
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО04-01-2003 01:30 PM
тАО04-01-2003 01:30 PM
Re: Auto RAID 12h: Performance
Here are the files you requsted. Thank you
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО04-01-2003 09:23 PM
тАО04-01-2003 09:23 PM
Re: Auto RAID 12h: Performance
file is damaged. Although ITRC states that max file size is 1MB, in reality it's 256K. File attached is 717MB in size, and I guess logprint in a large file there. So please use '-s' (start date) option with logprint (starting, let's say, from Feb 1) to cut earlier AutoRAID events.
You have to manage to get file to 256K limit
Eugeny
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО04-02-2003 01:17 AM
тАО04-02-2003 01:17 AM
Re: Auto RAID 12h: Performance
If an AutoRAID is not configured well, then, yes, it can be slower than JBOD, it can be slower than anything in this world.
First, how much data is in your AutoRAID? If it is approching 90% of the total disk space, then this is your problem. AutoRAID works by putting the least-used data in RAID 5, the most-used data in RAID 0/1. If your data is close to 90% of disk space, then your data will be getting from RAID 5 to RAID 0/1 all the time, bringing it extremely slow.
Recommendation is to always keep AutoRAID having 50% or 60% of total disk space unallocated, so that all data is in RAID 0/1, which is much faster than RAID 5.
HTH,
Vince
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО04-02-2003 08:02 AM
тАО04-02-2003 08:02 AM
Re: Auto RAID 12h: Performance
please take look at the attached files. As suggested I am including logprint output from Feb 1st. The arraydsp output shd give you info about the usage of the 12h. Thanks
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО04-02-2003 08:48 AM
тАО04-02-2003 08:48 AM
Re: Auto RAID 12h: Performance
Please note that latest firmware for 12h is HP62. I do not remember its improvements, but it was recommended to roll to HP62
Eugeny
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО04-02-2003 09:48 AM
тАО04-02-2003 09:48 AM
Re: Auto RAID 12h: Performance
Thanks for your help. So now going back to my problem, I guess I have to totally concentrate on Oracle, sql, exec plans etc. for the slow query executions on my prod machine.
I have one question. How did you exactly figured that the disk in slot A5 has timeouts? As a matter fact, I do have a open call to HP about this timeout message i got in my syslog.log file. (Funny, they never asked me about the files/output(logprint, arraydsp) you asked!) I know how to figure the physical path. but does it actually point to a disk on a RAID? I will also look into upgrading the firmware. Thanks again for your help. - Rao