Hi Folks, I am using SLES 10 latest beta bits. I think there was a problem in QLogic driver in SLES 10 beta bits. I have a VA (Virtual Array), it has 4 LUNs, /dev/sda, /dev/sdb, /dev/sdc, /dev/sdd. To reset scsi device i isssued the following command #sg_reset -d /dev/sg1. After issueing this command, the machine is not coming up ( it is hanging) Later i wrote the following script for resetting device,. but still i have the same problem int main(int argc, char * argv[]) { int fd; int rc; int arg=2; if ((fd=open("/dev/sg3", O_RDWR)) < 0) { printf( "device open fails"); return -1; } if ((rc=ioctl(fd,SG_SCSI_RESET,&arg)) < 0 ){ printf( " ioctl failed "); close (fd); return -1; } printf ( " reset success "); close (fd); return 0; } After running the above script, the status of the machine is something like this 4>[ACPI Debug] String: [0x0B] "_TMP Method" :<6>qla2300 0000:06:01.0: scsi(0:0:2:0): LOOP RESET ISSUED. :<0>BUG: spinlock already unlocked on CPU#0, diskres/5242 :<0> lock: dfbd4034, .magic: dead4ead, .owner: <none>/-1, .owner_cpu: -1 :<4> [<c01058fa>] show_trace+0xd/0xf :<4> [<c0105a1d>] dump_stack+0x17/0x19 :<4> [<c01ce308>] spin_bug+0x7e/0xc0 <4> [<c01ce376>] _raw_spin_unlock+0x2c/0x70 :<4> [<c02c5878>] _spin_unlock_irq+0x8/0xb :<4> [<f933613c>] qla2xxx_eh_bus_reset+0xae/0x1cc [qla2xxx] :<4> [<f90290b8>] scsi_try_bus_reset+0x41/0x9a [scsi_mod] :<4> [<f90297fe>] scsi_reset_provider+0x111/0x19e [scsi_mod] :<4> [<f90c282d>] sg_ioctl+0x8e5/0x9ca [sg] <4> [<c0172f77>] do_ioctl+0x4f/0x68 :<4> [<c01731ea>] vfs_ioctl+0x25a/0x26d :<4> [<c0173244>] sys_ioctl+0x47/0x63 :<4> [<c0103e39>] syscall_call+0x7/0xb :<6>qla2300 0000:06:01.0: qla2xxx_eh_bus_reset: reset succeded \ Your help is appreciated. Regards, Masthan