Hi Mathias , Sorry about this, I should have put this in first place . Also these are two kernel versions . I had big issues with adaptec drivers in kernel 2.6.11 and so I had switched to symbios card which I was using till the weekend. hth yogesh Symbios kern messages (kernel 2.6.12.2) sym0: <895> rev 0x2 at pci 0000:03:09.0 irq 27 sym0: Symbios NVRAM, ID 15, Fast-40, LVD, parity checking sym0: open drain IRQ line driver, using on-chip SRAM sym0: using LOAD/STORE-based firmware. sym0: SCSI BUS has been reset. scsi1 : sym-2.2.0 Vendor: ADVUNI Model: OXYGENRAID 3000R Rev: 327I Type: Direct-Access ANSI SCSI revision: 04 target1:0:1: tagged command queuing enabled, command queue depth 16. target1:0:1: Beginning Domain Validation target1:0:1: asynchronous. WIDTH IS 1 1:0:1:0: ODD transfer in DATA IN phase. 1:0:1:0: COMMAND FAILED (87 0 10). target1:0:1: Wide Transfers Fail target1:0:1: asynchronous. target1:0:1: Domain Validation skipping write tests target1:0:1: FAST-40 SCSI 40.0 MB/s ST (25 ns, offset 31) target1:0:1: Ending Domain Validation SCSI device sdb: 3148468224 512-byte hdwr sectors (1612016 MB) SCSI device sdb: drive cache: write through SCSI device sdb: 3148468224 512-byte hdwr sectors (1612016 MB) SCSI device sdb: drive cache: write through sdb: sdb1 sdb2 < sdb5 > Attached scsi disk sdb at scsi1, channel 0, id 1, lun 0 Attached scsi generic sg2 at scsi1, channel 0, id 1, lun 0, type 0 Vendor: ADVUNI Model: OXYGENRAID 3000R Rev: 327I Type: Direct-Access ANSI SCSI revision: 04 target1:0:1: tagged command queuing enabled, command queue depth 16. SCSI device sdc: 2927063040 512-byte hdwr sectors (1498656 MB) SCSI device sdc: drive cache: write through SCSI device sdc: 2927063040 512-byte hdwr sectors (1498656 MB) SCSI device sdc: drive cache: write through sdc: sdc1 sdc2 sdc3 sdc4 < sdc5 sdc6 sdc7 sdc8 > Attached scsi disk sdc at scsi1, channel 0, id 1, lun 1 Attached scsi generic sg3 at scsi1, channel 0, id 1, lun 1, type 0 Vendor: ADVUNI Model: OXYGENRAID 3000R Rev: 327I Type: Direct-Access ANSI SCSI revision: 04 target1:0:1: tagged command queuing enabled, command queue depth 16. SCSI device sdd: 585412608 512-byte hdwr sectors (299731 MB) SCSI device sdd: drive cache: write through SCSI device sdd: 585412608 512-byte hdwr sectors (299731 MB) SCSI device sdd: drive cache: write through sdd: sdd1 Adaptec kernel messages (kernel 2.6.13) ACPI: PCI Interrupt 0000:03:08.0[A] -> GSI 24 (level, low) -> IRQ 22 scsi2 : Adaptec AIC7XXX EISA/VLB/PCI SCSI HBA DRIVER, Rev 6.2.36 <Adaptec 3960D Ultra160 SCSI adapter> aic7899: Ultra160 Wide Channel A, SCSI Id=7, 32/253 SCBs Vendor: ADVUNI Model: OXYGENRAID 3000R Rev: 327I Type: Direct-Access ANSI SCSI revision: 04 target2:0:1: asynchronous. scsi2:A:1:0: Tagged Queuing enabled. Depth 2 target2:0:1: Beginning Domain Validation target2:0:1: wide asynchronous. target2:0:1: Domain Validation skipping write tests target2:0:1: FAST-80 WIDE SCSI 160.0 MB/s DT (12.5 ns, offset 62) target2:0:1: Ending Domain Validation SCSI device sdb: 3148468224 512-byte hdwr sectors (1612016 MB) SCSI device sdb: drive cache: write through SCSI device sdb: 3148468224 512-byte hdwr sectors (1612016 MB) SCSI device sdb: drive cache: write through sdb: sdb1 sdb2 < sdb5 > Attached scsi disk sdb at scsi2, channel 0, id 1, lun 0 Attached scsi generic sg2 at scsi2, channel 0, id 1, lun 0, type 0 Vendor: ADVUNI Model: OXYGENRAID 3000R Rev: 327I Type: Direct-Access ANSI SCSI revision: 04 scsi2:A:1:1: Tagged Queuing enabled. Depth 2 SCSI device sdc: 2927063040 512-byte hdwr sectors (1498656 MB) SCSI device sdc: drive cache: write through SCSI device sdc: 2927063040 512-byte hdwr sectors (1498656 MB) SCSI device sdc: drive cache: write through sdc: sdc1 sdc2 sdc3 sdc4 < sdc5 sdc6 sdc7 sdc8 > Attached scsi disk sdc at scsi2, channel 0, id 1, lun 1 Attached scsi generic sg3 at scsi2, channel 0, id 1, lun 1, type 0 Vendor: ADVUNI Model: OXYGENRAID 3000R Rev: 327I Type: Direct-Access ANSI SCSI revision: 04 scsi2:A:1:2: Tagged Queuing enabled. Depth 2 SCSI device sdd: 585412608 512-byte hdwr sectors (299731 MB) SCSI device sdd: drive cache: write through SCSI device sdd: 585412608 512-byte hdwr sectors (299731 MB) SCSI device sdd: drive cache: write through sdd: sdd1 Attached scsi disk sdd at scsi2, channel 0, id 1, lun 2 Attached scsi generic sg4 at scsi2, channel 0, id 1, lun 2, type 0 - : send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html