Slow dump speeds
UTSI
April 15th, 2009
I have GSS2.5 Im deploying 50 new Lenovo x200 Tablets with onboard intel 82567LM Nic. I have created an image using the ghost cast server using PXE boot, and the following switches -ib required for the tablet to boot. Im able to dump the image at normal speeds of 650mb/min onto 1 tablet, but once i add more than 1 tablet to multicast the speeds drops to 15mb/min. I tried different drivers from lenovo and intel. Our network hasnt changed and we image different models of laptops daily and up to 100 laptops at a time at fast speeds. Does anyone have any clue what can be going on?
UT SI
Try to force a unicast session when restoring the image. Do you see a difference in throughput speeds?
Multicast works by using
Multicast works by using smallest common denominator. So if one client is going slower than other(s) then the slowest speed will be selected for multicast.
OK i think I figured this
OK i think I figured this out:
Tablet SATA was set to ACHI, I changed to compability mode, it's weird becuase previous tablet were never changed and worked fine. I found some topics that the HD controller and nic had irq conflicts. What I dont understand that if I'm able to restore an image to 1 tablet on ACHI mode and get speeds of 650/mb on multicast mode. Then soon as I add more on the multicast session it bombs right after i restore the NTFS MFT table going into the restore of the NTFS logfile. I dont know maybe changing to Compability mode fix the IRQ conflicts, and that's why it works.
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