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To determine disks in XP256/ XP1024 array

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Ninad_1
Honored Contributor

To determine disks in XP256/ XP1024 array

Hi,

How do I check how many disks are configured in a XP256 or a XP1024 array , what are the sizes of the disks and what raids are configured from these disks ? from xpinfo I could see some raid configuration details but am not able to understand very clearly as have not worked on these arrays.

Regs,
Nad
6 REPLIES
Patrol
Advisor

Re: To determine disks in XP256/ XP1024 array

Please assign more points to the answers provided to you in the past to get a better and faste response.

Your ratio is 99/148 = 0.67
Devender Khatana
Honored Contributor

Re: To determine disks in XP256/ XP1024 array

Hi,

A lot of this information can be gained through command view XP software.It can provide you with
1. The quantity & sizes of different disks available.
2. Different raid groups and their types.
3. Utilization etc.

HTH,
Devender
Impossible itself mentions "I m possible"
Ninad_1
Honored Contributor

Re: To determine disks in XP256/ XP1024 array

Hi,

I guess command view XP is a licensed software . Is there any other method as well ?

Regs,
Nad
Devender Khatana
Honored Contributor

Re: To determine disks in XP256/ XP1024 array

Hi,

Command view allthough licensed but is very helpful to monitor your array closely. In the absence of that I think xpinfo with some switches in the only option left which I assume you have allready tried.

An extract from xpinfo
Myhost:/>>xpinfo -r |more

Scanning disk devices...


Device File --- ACP Pair--Raid Level---Raid Group--Raid Mechanisms
============================================================
/dev/rdsk/c34t0d0 1 RAID5 1-14 R100D R110D R120D R130D
/dev/rdsk/c34t0d1 2 RAID5 2-14 R140D R150D R160D R170D
/dev/rdsk/c34t0d2 3 RAID5 3-14 L100D L110D L120D L130D
/dev/rdsk/c34t0d3 1 RAID5 1-14 R100D R110D R120D R130D
/dev/rdsk/c34t0d4 2 RAID5 2-14 R140D R150D R160D R170D
/dev/rdsk/c34t0d5 3 RAID5 3-14 L100D L110D L120D L130D
/dev/rdsk/c34t0d6 1 RAID5 1-14 R100D R110D R120D R130D
/dev/rdsk/c34t0d7 2 RAID5 2-14 R140D R150D R160D R170D
/dev/rdsk/c34t1d0 3 RAID5 3-14 L100D L110D L120D L130D
/dev/rdsk/c17t0d0 2 RAID5 6-8 R247 R257 R267 R277
/dev/rdsk/c17t0d1 1 RAID5 5-8 R207 R217 R227 R237
/dev/rdsk/c17t0d2 2 RAID5 2-8 R147 R157 R167 R177
/dev/rdsk/c17t0d3 1 RAID5 1-8 R107 R117 R127 R137
/dev/rdsk/c17t0d4 2 RAID5 6-7 R246 R256 R266 R276
/dev/rdsk/c17t0d5 1 RAID5 5-7 R206 R216 R226 R236
/dev/rdsk/c17t0d6 2 RAID5 2-7 R146 R156 R166 R176
/dev/rdsk/c17t0d7 1 RAID5 1-7 R106 R116 R126 R136
/dev/rdsk/c17t1d0 2 RAID5 6-6 R245 R255 R265 R275
/dev/rdsk/c17t1d1 1 RAID5 5-6 R205 R215 R225 R235
/dev/rdsk/c17t1d2 2 RAID5 2-6 R145 R155 R165 R175
/dev/rdsk/c17t1d3 1 RAID5 1-6 R105 R115 R125 R135
/dev/rdsk/c17t1d4 2 RAID5 6-5 R244 R254 R264 R274
/dev/rdsk/c17t1d5 1 RAID5 5-5 R204 R214 R224 R234
/dev/rdsk/c17t1d6 2 RAID5 2-5 R144 R154 R164 R174
/dev/rdsk/c17t1d7 1 RAID5 1-5 R104 R114 R124 R134
/dev/rdsk/c17t2d0 2 RAID5 6-4 R243 R253 R263 R273
/dev/rdsk/c17t2d1 1 RAID5 5-4 R203 R213 R223 R233
/dev/rdsk/c17t2d2 2 RAID5 2-4 R143 R153 R163 R173
/dev/rdsk/c17t2d3 1 RAID5 1-4 R103 R113 R123 R133
/dev/rdsk/c17t2d4 2 RAID5 6-3 R242 R252 R262 R272

It tell you whicl device file belongs to which raid type , raid group & which physical disks it corresponds to. I do not think you can have the physical disk details from here.

HTH,
Devender
Impossible itself mentions "I m possible"
Ninad_1
Honored Contributor

Re: To determine disks in XP256/ XP1024 array

Hi Devender,

Its long time I started this thread but anyways.
Can you please explain the meaning of the sample output you have provided.
like -
What does the Raid Group signify (1-14 Is it anything like the 1st group in a set of 14 sets ?)
What is Raid Mechanics ? (are these the physical disks used to configure the Raid 5 set)
Why are different devices showing same Raid group ? (c34t0d0, c34t0d3, c34t0d6 - Does this mean that the after the Raid 5 set has been configured it is partitioned ? )
What does the disk name signify (R100D , L100D , R247 - why some disks have D in the end and some do not have ?)

Thanks,
Nad
Vincent Fleming
Honored Contributor
Solution

Re: To determine disks in XP256/ XP1024 array

Nad,

If you have an XP, you have CommandView. CommandView is the only way to get a complete view of the array. Using XPINFO, you can (at best) see ONLY the portion(s) of the array that that particular server sees. Other parts may be hidden.

Now, to answer your other questions:

The RAID group numbers indicate a group of 4 or 8 disks, and their location within the array. 1-14 is the 14th group of disks in Quadrant 1, which is the lower-right of the first cabinet to the right of the control unit.

The RAID Mechanisms are the actual disk locations within the array - the codes indicate the exact slot where the drive(s) is located. You can use this information to tell if a drive died and spared out, for example. Generally, it's not very useful information for you to see, as it means virtually nothing.

Yes, the raid groups are partitioned after formatting. These partitions are called LDEVs (Logical DEVices), The LDEVs get assigned to a FC port and LUN number to be seen by a host. An LDEV may appear on many ports.

If you play with the options to xpinfo (you should read the man pages, too), it will provide a lot more information.

The format of the disk names (with or without a D) have no useful meaning to you as a user, so don't worry about them. They change from model to model becuase the disk slots themselves have changed.

A far more important piece of information is the CU:LDEV number. CU is Control Unit, and I explained LDEV earlier. Basically, once the array has been formatted and partitioned (using your terminology), the LDEVs are numbered. From then on, the CU:LDEV (example, 00:da - it's in hex) is the means by which you refer to an LDEV - a particular portion of a particular raid set.

Good luck,

Vince
No matter where you go, there you are.