Data Move from IBM to HP SAN

[Vipulinux]

Hello

I am planning to move a huge amount of data 3 TB from an IBM SAN(FastT600) to an HP MSA1000 SAN

The IBM SAN is connected to two IBM X445 servers. I want these two server to connect to the HP SAN and all data from IBM SAN should also be moved to the HP SAN.

What is the best way forward for this.

Regards,
Vipul

[Vipulinux]

I tried the following

exported file system on IBM SAN
mounted the above exported file systems on hp san
used cp -Rp command to copy all files.

Issue I face is that some file systems are ocfs and the cp command fails and there arfe some NFS errors/ file input output errors.
I use nfs 3.0.

Anyone having faced this.

[Patrick Terlisten]

Hello,

create a logical drive with the same size on the MSA1000. Then build a RAID 1 with mdadm between the two LUNs. When the mirror is complete, break the mirror.

I did this a few times without a problem.

Regards,
Patrick

[Vipulinux]

Hi

I have 2 different SAN, if it was one san i could have use mirroring, how can i do it for 2 different SAN's

Thanks

[Patrick Terlisten]

Hello Vipul,

please define "SAN". Do you mean two different storages, two different SANs with different fabrics or what?

If you have two storages in one SAN (SAN is a network, not a single storage-array), then you can present one LUN from your IBM storage-array, and one LUN from your HP storage-array to you server and mirror these LUNs with a host-based mirror. The LUNs must have the same size.

If you have two complete different SANs (mean two storage networks with their own fc-switches, storage-arrays....), then you need to connect you server to both SANs and then you need to present the LUNs from your storages to that server.

Regards,
Patrick

[Vipulinux]

Hi Patrick

I have 2 SANS. One is IBM FASTT600 and 2nd is HP MSA1000. I want to dispose tyhe ibm san and want all data from ibm san to go to the HP SAN.

I have 2 server's connected to the ibm san, and i have another serve rconnect to the hp san.
I tried nfs but as i have ocfs in the san disks i cant move it over the nfs.

Cheers

[Amar_Joshi]

Hi Vipul,

You will have to make both Storage (IBM & HP) available to your new server for this migration. HINT: if they are connected via the same SAN Fabric (brocade/cisco/mcdata), enable the zoning to achieve this and then use "mdadm" to enable the mirror.

Sequence would be:

1. export IBM Storage filesytem(s) from existing server.
2. enable zoning so that new server can see IBM & HP Storage.
3. create same size LUNs on HP storage and present to new server.
4. mount IBM storage filesystems on new server.
5. "mdadm" to mirror the volumes (make sure IBM storage writes to HP storage).
6. remove the IBM storage's mirror members from the volumes.

DONE !!!

Hope that helps