Convert 2-way-mirror to RAID-5 ...possible?

>>>>>>That target LUN can be raid 1 while the source might be raid 5.

You mean that vice versa is possible?

Thanks,

BMK

Using Open replicator, I think so, but remember that OR, just like SAN Copy on Clariion needs 2 storage arrays. You cannot OR or SC from 1 box to the same box.

2 way mirror can be converted to BCV.

convert dev 1234 to BCV+R-5;

No, emc155688

it was discussed before https://community.emc.com/message/389287#389287

Message was edited by: Yousef

Very short but correct answer

Between Syms you could use open replicator to migrate data from a certain symdev or meta to a lun on the target. That target LUN can be raid 1 while the source might be raid 5.

Oh, you mean from mirrored to unprotected ? I'm not sure, but I think you can. Why don't you try it ? Create a small mirrored BCV, sync it with some symdev, split it, try to convert to unprotected and see whether or not the data is still there. Since it was mirrored I think this is possible.

From R5 to unprotected or from R5 to mirrored is not possible.

I'd like to be sure too, but I'm not 100% sure....

RRR, you can convert 2way mirr to BCV but not BCV & R5

Krishna , even for the OR you have to have the OR licenses , it will be easier to have temp third dev. or clone if you use the same box , i guess you do.

you type the below

"2 way mirror can be converted to BCV. convert dev 1234 to BCV+R-5;"    as am sure its not possible so i was confirming !

am out of office to test the BCV one, will try it soon, but i remember its an valid option with SMC .

From mirrored to bcv-mirrored is possible. Not to BCV-raid5. My mistake, sorry. I was thinking 2 chapters ahead...

The only way this would be possible would be with the virtual lun migration feature available in 5874 code (VMAX) and SE 7.x

With this command set you can change convert device to different protection or move between disk groups in the array.

e.g.

symmigrate ‑name convert_r5 ‑file devlist.txt ‑sid XXX ‑tgt_unconfig ‑tgt_dsk_grp YY  ‑tgt_raid5 ‑tgt_prot 3+1

You can issue the above command with a validate to verify that it is possible and then with an establish to kick off the migration.

symmigrate -name convert_r5 query

symmigrate -name convert_r5 terminate

The above command (if I have the syntax right) would migrate the devices in file devlist.txt to unconfigured space in the vmax changing the protection to raid5 3+1 from their original config.  It's easier with SMC.

This probably won't help in your case if you don't have VMAX, just letting you know the technology is out there.

This surely could be faster. Take a backup, delete the LUN, create a new one on the right raid level and restore the data.

hi, please what is  the correct sintansis

There is only one way paul mention.

if devide is on DMX do srdf move it to vmax, migrate there and come back to DMX.