We have recently implemented a BlueARC NAS device with 60TB of storage and have a Dual LTO 5 tape library. The BlueARC supports NDMP backup and from a post on your knowledge base you are not looking to implement NDMP in your software in the future. My question really is what would be the best way to get the full potential from the LTO drives when using Presstore?
I currently have a Trunked 4Gb link to our switch and 10GB to our NAS device, the Tape Library is connected over 4Gb Fibre, but I very rarely get above 5% buffer on the tape device, so the drives are obviously not being fed quickly enough. I have a client with the same setup but Atempo Time Navigator running NDMP and they get a significantly higher throughput to their drives.
I was in the middle of acquiring components to use in a new xsan build. 2 of which are 2x 3.0Ghz xserve (2008) for MDC. But there are unconfirmed list of dropped computers in Mountain lion and they are on the list. I dont think I would build a production xsan with the brand new os/xsan 3 but if there is never the option too upgrade show I look at getting newer MDC? I looked at the mac mini but its geek bench score was lower then the 8 core 2008 xserve.
Crashing in Xsan Volume suddenly 3 day ago, until now cannot MOUNT the VOLUME .
all the files & folders in Library/Filesystems/Xsan/ are deleted
tried to verefied the volume from Disk Utility .. but every time the same error ( partition map check failed because no slices were found )
unfortunately have no backup, and i can't lose the DATA on volume it's very important .
ANY ONE EXPERT HELP PLEASE !!!!!!!
1- G-Technology - G-speed FC XL 12 TB
2- Using Raid 5 +1 + hot-spair
3- Q-Logic 1400 Fiber switch 10 Ports
4- Apple Fiber Channel Card
5- a (One) MDC MAC pro 2x2.26GHz QUAD-CORE - INTEL 0
b 6G MHz RAM DDR 3
c Mac OS x server LION 10.7
e Xsan V.2.3
We expanded one of our volumes today and had some interesting results, I'm hoping someone might have seen this and can offer a resolution,
We expanded our VTRAK storage by stacking on an expansion chassis. We formatted the volume with Apple's preconfigured scripts, all logs show that went fine and the jobs are completed. We have a one 2TB LUN and pool for metadata and two 10 TB LUNs in a single pool for video. We added two additional 10 TB LUNs to the existing 20 TB pool for a total of 40TB. We're running XSAN 2.2.
We ran the expansion via XSAN to add the new LUNs to the current pool, all indications are that it went fine. The new pool and volume shows up as 40TB as you would expect. However, we do not have any more free space. We started with 3.75TB of free space, even though we expanded to 40TB we still have 3.75TB of free space according to XSAN admin, Finder, and cvadmin all indicate that we now have doubled the capacity of our volume but have not added any free space.
Log files indicate no problems. We have incrementally rebooted everything and also performed a full shutdown.