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#1
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Storage migration from vendor to vendor
Hello all,
The old annoying question comes back again. Due to decisions out of the hands of the technical people I am facing the need to migrate san storage from one storage vendor (STK) to another (EMC or Netapp or even something else) The question here is whether you are familiar with some technique or product that can assist in "copying" LUNs from one vendor to the other additionally with the limitation of not having the possibility to use fiber channel or having both storage boxes in the same fabric (in which case the migration could be done using volume management tools through the operating system). In other words it would be most preferrable to do the operation Any thoughts and ideas will be highly appreciated -- |
#2
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Storage migration from vendor to vendor
jlreate wrote:
Hello all, The old annoying question comes back again. Due to decisions out of the hands of the technical people I am facing the need to migrate san storage from one storage vendor (STK) to another (EMC or Netapp or even something else) The question here is whether you are familiar with some technique or product that can assist in "copying" LUNs from one vendor to the other additionally with the limitation of not having the possibility to use fiber channel or having both storage boxes in the same fabric (in which case the migration could be done using volume management tools through the operating system). In other words it would be most preferrable to do the operation In other words it would be most preferrable to do the operation over LAN/WAN. (sorry for missing that bit from the post) -- |
#3
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Storage migration from vendor to vendor
Take a look at the replication products from Kashya
(http://www.kashya.com). Not sure what your budget is, but they have products that will help this. The initial investment might be steep but done right you can roll that investment into a DR/backup solution after the initial migration is completed. They can connect to your SAN (OK, you say you can't do this) or by splitting writes from the host with a special driver. As I understand this product (just heard a presentation; have not actually used it) replication can then proceed locally or over a WAN. I'm sure there are other similar solutions out there if you look around. Bruce Clarke .. jlreate wrote: jlreate wrote: Hello all, The old annoying question comes back again. Due to decisions out of the hands of the technical people I am facing the need to migrate san storage from one storage vendor (STK) to another (EMC or Netapp or even something else) The question here is whether you are familiar with some technique or product that can assist in "copying" LUNs from one vendor to the other additionally with the limitation of not having the possibility to use fiber channel or having both storage boxes in the same fabric (in which case the migration could be done using volume management tools through the operating system). In other words it would be most preferrable to do the operation In other words it would be most preferrable to do the operation over LAN/WAN. (sorry for missing that bit from the post) -- |
#4
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Storage migration from vendor to vendor
The question here is whether you are familiar with some technique or
product that can assist in "copying" LUNs from one vendor to the other UNIX "dd" command can help. -- Maxim Shatskih, Windows DDK MVP StorageCraft Corporation http://www.storagecraft.com |
#5
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Storage migration from vendor to vendor
"jlreate" wrote in message
... Hello all, The old annoying question comes back again. Due to decisions out of the hands of the technical people I am facing the need to migrate san storage from one storage vendor (STK) to another (EMC or Netapp or even something else) The question here is whether you are familiar with some technique or product that can assist in "copying" LUNs from one vendor to the other additionally with the limitation of not having the possibility to use fiber channel or having both storage boxes in the same fabric (in which case the migration could be done using volume management tools through the operating system). In other words it would be most preferrable to do the operation Any thoughts and ideas will be highly appreciated Check out Falconstor. They claim to be able to do this with their IPStor appliances. They are used for this type of migrations by HDS. Rob |
#6
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Storage migration from vendor to vendor
jlreate wrote:
The old annoying question comes back again. Due to decisions out of the hands of the technical people I am facing the need to migrate san storage from one storage vendor (STK) to another (EMC or Netapp or even something else) The question here is whether you are familiar with some technique or product that can assist in "copying" LUNs from one vendor to the other additionally with the limitation of not having the possibility to use fiber channel or having both storage boxes in the same fabric (in which case the migration could be done using volume management tools through the operating system). You really have 2 basic options: 1. Use a host-based replication in which case the old and new storage needs to be visible to the hosts 2. Use an intermediate box that has the luns presented to it and does the copy in the middle. These suckers are pricey but can be fairly transparent. If you've got a spare $100K to drop, the moves can be done with minimal disruption. You would start by presenting your old storage to the intermediate box (IBM San Volume Controller is one such product), and then the intermediate box presents the lun back out to the original host. The intermediate system is responsible for doing the mirroring to your new storage array. Search for storage virtualization - there are a lot of players in this game and I expect some to be good and some to be bad. I don't have hands-on experience with any of them. If you're migrating to an EMC platform, then contact EMC - they have some high-speed SAN copy tools that can help you. We looked at it briefly but never pursued it. When we migrated from EMC to HP storage, we used host-based volume management whenever we could (all the Unix hosts) and a lot of robocopy for Windows. Good luck, .../Ed |
#7
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Storage migration from vendor to vendor
ewilts wrote:
jlreate wrote: The old annoying question comes back again. Due to decisions out of the hands of the technical people I am facing the need to migrate san storage from one storage vendor (STK) to another (EMC or Netapp or even something else) The question here is whether you are familiar with some technique or product that can assist in "copying" LUNs from one vendor to the other additionally with the limitation of not having the possibility to use fiber channel or having both storage boxes in the same fabric (in which case the migration could be done using volume management tools through the operating system). You really have 2 basic options: 1. Use a host-based replication in which case the old and new storage needs to be visible to the hosts 2. Use an intermediate box that has the luns presented to it and does the copy in the middle. These suckers are pricey but can be fairly transparent. If you've got a spare $100K to drop, the moves can be done with minimal disruption. You would start by presenting your old storage to the intermediate box (IBM San Volume Controller is one such product), and then the intermediate box presents the lun back out to the original host. The intermediate system is responsible for doing the mirroring to your new storage array. Search for storage virtualization - there are a lot of players in this game and I expect some to be good and some to be bad. I don't have hands-on experience with any of them. If you're migrating to an EMC platform, then contact EMC - they have some high-speed SAN copy tools that can help you. We looked at it briefly but never pursued it. When we migrated from EMC to HP storage, we used host-based volume management whenever we could (all the Unix hosts) and a lot of robocopy for Windows. Good luck, .../Ed Thanks Ed for the detailed answer and also thanks for everyone else for the excellent suggestions and answers. I decided to bend the rules and manage to stick both SAN arrays into the same fabric and do the transfer using the host-based replication (LVM). Thanks and regards, JL -- |
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