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Hi, I see two issues here. Cloning is a block level copy so you are right it will overwrite the veritas private region. But remember when you try to import the cloned diskgroup on the testb server it will think that it is already imported on testa. What I suggest doing is forcing the import but...

this may be the issue you are seeing; When VDEVs (virtual devices) are not "activated" for a snap session, they are "not ready" (NR) to the host, similar to when a BCV is established. Note: Virutal devices are the target devices for Symmetrix snap operations. NR is a SCSI device state...

This may be the issue you are seeing When VDEVs (virtual devices) are not "activated" for a snap session, they are "not ready" (NR) to the host, similar to when a BCV is established. Note: Virutal devices are the target devices for Symmetrix snap operations. NR is a SCSI device state...

have you put the naviagent on the host?

Hi, I think the view is that iSCSI is still a bit new. Check out some of the storage websites http://storagemagazine.techtarget.com/strgTrend/1,291266,sid35_gci963759,00.html www.byteandswitch.com colin.

What I would be looking at is the scalability of your switches should you need to grow. In that I am talking about your current topology, is it core and edge etc.. Should you need to grow you could migrate easily to a larger switch i.e. 64m or 140m and combine these with smaller switches for a...

Hi, I think what you are saying is correct, but I would double check with EMC. Colin

when I say offsets, what I mean is that with mcdata if you were to get the true domain id you would need to subtract 60hex from 7c and then convert the result to dec to find the true domain id (I believe a hangover from Mcdatas Escon switch days), with the port id you subtract 4 to get the...

the reason it needs to be the same size is because for each track on the 3 data disks we are Xor'ing together so we get one parity track that is written to the parity disk. as regards the other thing...good job I think you have it cracked...

Hi, not my area of expertise "maxtor disks" but I would imagine if there were any issues with the Raid group it would show up in Event Log. But I think what you are looking for is a proactive means of determining if you are getting bad block reassigns or an indication that you are going to have...

when a node flogis into the fabric the fabric controller assigns a 3-byte S_ID/D_ID. This is in hex and for a Mcdata switch would take the form of 0x7C0D13 (Mcdata always ends in 13). the S_id contains info on the domain id the node has logged into (1st byte 7C) and the port it is logged into...

hmmmm....good point, this might be an EMC-ism. OK lets think about this. We can write to the xD device but we cannot write to the xP device. The xD is an addressable unit of storage the xP is not. I wonder if you issued the same symdev command on 4D8 and 538 would you get 4D8 showing up as xP...

okay I think I got you this time. There may be a bit of confusion between Raid-s and Raid-5. If you think of a physical disk like the one in the symdisk disk command, there are a number of devices or hypers on the disk, (we call for eaxmple this disk 1). EMC in Raid-s will take a hyper from...

Hi, I know this is going to be really unhelpful, but if you could let us know a bit more about the system you have we might be able to come back with some good information, all the best, Colin

Hi VPTL, hope this answers some of your questions. 1.vol# - not sure of, would have said it is the hyper number of the logical on disk but its already got a column for that. It may be the raid rank. 2. Not sure what you mean here, if you mean why are there multiple paritys on the same disk, its...

Hi Terry, you should be able to ISL the switches together. If the fabric merges the zoning information you currently have on the 8 port brocade switcheswill show up on the 2800. There are a few gotchas with merging zones and you need to be careful. If you have a powerlink logon for emc's website...

Hi Terry, you should be able to ISL the switches together. If the fabric merges the zoning information you currently have on the 8 port brocade switcheswill show up on the 2800. There are a few gotchas with merging zones and you need to be careful. If you have a powerlink logon for emc's website...

You need also to take into consideration the fan in ratio. Usually it is 12:1 on symmetrix systems but check the intropability matrices on powerlink. You can use the following command if you have solutions enabler "./symmask -sid xxx list logins | more" Only count the devices that are logined in...

I agree with Chacalinc on this one. Also, interface with the vendor on this one. They should be able to provide you with some statistics i.e. IOPs on port. The thing you need to understand is the profile of your workload and what blocksize it is using, as blocksize is a determining factor in the...

Fall through time is not a measure of cache residency, as the data within cache, for example, can get rewritten, a write on WP thus the data has changed and been promoted again to the top of the LRU. But yes if your fall through time is low and you have a low cache hit rate chances are you have...