I got a serious problem with a Debian install on an ESXi 5.0 Server.
 Debian installs fine and seems to run fine, but the harddisk performance is
 really low.
 I got latency times of about 44 seconds, tested with bonnie++.
 What I´ve done:
 - New machine in ESXi, harddisk controller "LSI Parallel" (Debian uses the
 LSI53c1030 driver (mptlinux v 3.04.12))
 - hdparm -i /dev/sda says:
 /dev/sda
 SG_IO bad / missing sense data.
 The latest drivers from LSI are 4.28. I don´t know if it is a driver problem
 oder VMWare Problem.
 I also did a new install with harddisk controller setting "LSI SAS", but no
 performance improvement.
 The VMWare ESXi Server should be alright, because a SLES11 Instance that
 runs on the same machine and same datastore performs well.
 LSI provides new drivers (v 4.28) but RHEL/SLES only and a conversion via
 alien and later install of the deb-File brought no change.
 Anyone got a clue how to get this running?