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тАО05-03-2007 02:51 AM
тАО05-03-2007 02:51 AM
rx2660 Built-in RAID Question
So during BIOS, if I break the boot, and go into the RAID controller, I see both drives, and that they are in a mirror. If I move from one drive to another in the RAID BIOS, the blue blinky "find me" lights on both drives follow the BIOS prompt.
The question I have is that during normal drive operations, ONLY the activity light of the first drive (slot 8) ever blinks. Slot 7 (the mirror) never shows activity. Is it really mirrored? Is it really working? How do I tell? I have never seen a hardware RAID controller that acted like this. All the ones I have ever seen before, ALL members of the mirrored RAID group light's flash in unison when mirrored. I expect to see both activity LEDs flash in sync.
Can someone confirm that this is "normal" for one of these RAID controllers?
Yes, I did the expected reading of manuals, google searches, etc. before bothering you guys.
Thanks.
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тАО05-03-2007 03:35 AM
тАО05-03-2007 03:35 AM
Re: rx2660 Built-in RAID Question
I have not seen this in action yet, but to check the RAID status run
# sasmgr get_info -D /dev/sasd0 -q raid
This will give you information about the configured RAID(s).
(adjust /dev/sasd0 if needed)
Hope this helps!
Regards
Torsten.
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тАО05-03-2007 04:20 AM
тАО05-03-2007 04:20 AM
Re: rx2660 Built-in RAID Question
No, the command doesn't work:
# sasmgr get_info -D /dev/sasd0 -q raid
ERROR: No devices connected.
This one does, though:
# sasmgr get_info -D /dev/sasd0
Driver Name : sasd
Bundle Version : B.11.23.03
Product Number : AB419-60001
Hardware Path : 0/1/1/0
Health of HBA : ONLINE
PCI Vendor ID : 0x1000
PCI Device ID : 0x0054
PCI Subsystem Vendor ID : 0x1312
PCI Subsystem ID : 0x103c
PCI Revision ID : 0x0001
Max. PHYs supported : 8
Max. IO size : 1048576
*********************************************************************
***** HBA Specific information
*********************************************************************
HBA state : READY
Driver firmware dump available : NO
Driver firmware dump timestamp : N/A
Firmware Revision : 1.16.0.0
So I'm confused.... Are you saying that it likely is NOT in a mirror? Even though the RAID controller BIOS shows it is? I've never heard of a hardware RAID device that you had to configure from the OS.
What do I do to fix it?
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тАО05-03-2007 04:48 AM
тАО05-03-2007 04:48 AM
Re: rx2660 Built-in RAID Question
# sasmgr get_info -D /dev/sasd0 -q raid Tue Dec 12 02:45:03 2006 ---------- PHYSICAL DRIVES ----------LUN dsf SAS Address Enclosure Bay Size(MB) /dev/rdsk/c1t2d0 0x500000e012691cb2 1 3 70007 /dev/rdsk/c1t3d0 0x500000e0126926d2 1 4 70007 /dev/rdsk/c1t4d0 0x500000e01122d7d2 1 5 34732 /dev/rdsk/c1t7d0 0x500000e01263fcc2 1 8 34732 ---------- LOGICAL DRIVE 4 ---------- Raid Level : RAID 1 Volume sas address : 0x611d224fa01c82 Device Special File : /dev/rdsk/c1t10d0 Raid State : OPTIMAL Raid Status Flag : ENABLED Raid Size : 34000 Rebuild Rate : 20.00 % Rebuild Progress : 100.00 % Participating Physical Drive(s) : SAS Address Enc Bay Size(MB) Type State 0x500000e01268e312 1 1 70007 SECONDARY ONLINE 0x500000e012691ee2 1 2 70007 PRIMARY ONLINE
I'm reading the manual...
http://docs.hp.com/en/J6369-90041/index.html
Hope this helps!
Regards
Torsten.
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тАО05-03-2007 05:00 AM
тАО05-03-2007 05:00 AM
Re: rx2660 Built-in RAID Question
I think Torsten was assuming you had the older SAS HBA which came in the rx3600/6600, and used the sasd driver when in fact it looks like you have the PCIe SmartArray controller which uses the ciss driver. Instead of sasmgr you should be using saconfig:
Identify your RAID controller using:
ioscan -kfnd ciss
Then query the config of the RAID controller with:
saconfig /dev/cissN
As to your original question, remember:
- You might not be doing much write IO to the root/boot disks anyway.
- The P400 has cache so some IOs are probably getting serviced there.
- Depending on the RAID algorithm used, reads might generall all be from one disk anyway (certainly with Mirrordisk, you always saw a lot more read activity from one disk in the pair)
Have you actually tried running a big write to one of the root filesystems and looking at the activity lights then (obviously be careful not to fill up something critical) - why not use dd to generate a big sequential write to /var/tmp if you have the space...
HTH
Duncan
I am an HPE Employee
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тАО05-03-2007 05:40 AM
тАО05-03-2007 05:40 AM
Re: rx2660 Built-in RAID Question
I cannot read as fast as they develop new controllers.
First interesting information is a "ioscan -fn".
If the disks are connected to the P400, you should see a /dev/cissX devicefile for the controller.
Now the sautil/saconfig command will give you the details, e.g.:
# sautil /dev/ciss5 -s
# saconfig /dev/ciss5
This is the appropriate manual link:
http://docs.hp.com/en/J6369-90037/index.html
Hope this helps!
Regards
Torsten.
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those who understand binary, and those who don't.
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тАО05-03-2007 07:23 AM
тАО05-03-2007 07:23 AM
Re: rx2660 Built-in RAID Question
I figured that since this was a completely brand new server, with a default load of 11.23 on it (which I got media for with it), that it wouldn't hurt anything to reboot it, stop the boot and play around in the raid controller bios.
So I did. I then decided just to throw the existing volume away. Then I'd set up another and see if it behaved the same.
So I did.
And then I discovered that DVD drives are not standard equipment on rx2660's. So I killed my boot drive and cannot reload.
Geez, you'd think that salesmen would suggest buying a darn DVD drive. He was happy to sell me DVD media. Too bad I can't read it.
Anyway, thanks for the help, when I get to where I can boot again (grr) I'll try the ciss device.
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тАО05-03-2007 07:32 AM
тАО05-03-2007 07:32 AM
Re: rx2660 Built-in RAID Question
See the options page. Here you will find that the configured RAID is an option - none, RAID1, 5 or 6.
The DVD option is also there.
http://h20341.www2.hp.com/integrity/cache/452309-0-0-0-121.html
Hope this helps!
Regards
Torsten.
__________________________________________________
There are only 10 types of people in the world -
those who understand binary, and those who don't.
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