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ajahnkeFlag for United States of America

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ShadowProtect Backup Very Slow

I'm trying to backup an iSCSI volume (about 1.5TB) attached to a Windows Server 2008 R2 virtual machine (on Hyper-V), but every time I kick off the seed the backup starts running at about 800KBps and says it's going to take 21 days to complete.

If, however, I just copy a 46GB file from the iSCSI volume and just paste it to the share on the BDR (also Server 2k8 R2), it runs at 80+MBps solid. In other words, I can't seem to replicate the problem outside of ShadowProtect. I have already tried some suggestions about disabling TCP Checksum Offload on both the VM NIC and host NIC, but it hasn't made a difference. And help is greatly appreciated -
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Roshan Mohammed
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are you trying to backup the "iSCSI volume (about 1.5TB)" from the hyper-v host. or is the shadowprotect installed in the guest os.
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ASKER

ShadowProtect is installed on the guest OS, which has exclusive access to the iSCSI volume.
so it's like a Raw Device mapping. how big are the luns.
has the backup ever worked before.

trying backup up a 1tb volume.

where is it backing up to.
check with storagecraft support, they are helpful.

One thing they will ask which is the disk spin when the shadowprotect running.
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ajahnke
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There was no real solution to the problem - enabling multiple threads seemed to help, but for some reason this type of backup isn't supported by StorageCraft.