Hi all,
I know this has been asked before and I've looked at the other articles but still with no resolution on my end.
My configuration is: Dell PowerVault LTO5-140HH Single Stand Alone tape drive (upgraded firmware and drivers ltotape.sys ver 6.0.6002.22167) using Dell Ultrium LTO5 tapes. My DPM server is running on Server 2008 STD SP2. Im using DPM 2012 ver 4.0.1920.0 fully updated.
My problem is that DPM is only writing 1.43tb of data then stops and waits for another tape, I would like it to compress the data (data being backed up is SQL, Hyper-V VM's, Exchange, system states) and only use one tape. All of my protection groups have the compress data option selected but when I use mytape.exe to view the drive info it shows that Hardware Data Compression is: Disabled, it also shows that Supports Hardware Data Compression is: TRUE.
I've gone and tried, using mytape.exe, to set the hardware data compression to enabled, but when the backup job begins and I check, it is back to disabled again. I turned on the vebose logging and saw this
<MTASetMedia>
VERBOSE <StorageXml>
<StorageType xmlns="http://schemas.microsoft.com/2003/dls/MediaManager/StorageXMLSchema.xsd">Tape</StorageType>
<TapeInfo DriveAccessPath="\\.\Tape2147483646" PhysicalBlockSize="65536"HWCompression="false" xmlns="http://schemas.microsoft.com/2003/dls/MediaManager/StorageXMLSchema.xsd" />
</StorageXml>
</MTASetMedia>
for some reason the HWCompression is false.
I've read that DPM just sends a command to the tape drive for compression, and i'm pretty sure my tape drive supports but why isn't it enabling? So far I'm at a loss on what to try next. Is it my data I'm backing up not compressable and that's why it wanting two tapes instead of one?
Any help would be appreciated!
Thanks in advance