hi, we've got a server with 6 sata disk (2 system raid1, 4 data raid5). recently we've got such error is the log and in these case the system is totally hang ie. it seems to crash but after 30-40 sec is start to working. we already 2 times replace the sata cables the problem still arrise what's more with different data disk (so not the same). we assume it can be some kind of sata driver bug or motherboard issue? kernel-2.6.18-8.1.6.el5.x86_64 on gigabyte ga-81955x motherboard with SAMSUNG SP2504C disks. anybody has any tipp? thanks in advance. ---------------------------------- Jul 4 12:12:50 piros kernel: ata3.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x2 frozen Jul 4 12:12:50 piros kernel: ata3.00: tag 0 cmd 0xea Emask 0x4 stat 0x40 err 0x0 (timeout) Jul 4 12:12:50 piros kernel: ata3: soft resetting port Jul 4 12:12:53 piros kernel: ata3: softreset failed (1st FIS failed) Jul 4 12:12:53 piros kernel: ata3: softreset failed, retrying in 5 secs Jul 4 12:12:58 piros kernel: ata3: hard resetting port Jul 4 12:13:05 piros kernel: ata3: port is slow to respond, this delay is known to occur on vacant SATA ports Jul 4 12:13:28 piros kernel: ata3: port failed to respond (30 secs) Jul 4 12:13:28 piros kernel: ata3: COMRESET failed (device not ready) Jul 4 12:13:28 piros kernel: ata3: hardreset failed, retrying in 5 secs Jul 4 12:13:33 piros kernel: ata3: hard resetting port Jul 4 12:13:33 piros kernel: ata3: SATA link up 3.0 Gbps (SStatus 123 SControl 300) Jul 4 12:13:33 piros kernel: ata3.00: configured for UDMA/133 Jul 4 12:13:33 piros kernel: ata3: EH complete Jul 4 12:13:33 piros kernel: SCSI device sdc: 488397168 512-byte hdwr sectors (250059 MB) Jul 4 12:13:33 piros kernel: sdc: Write Protect is off Jul 4 12:13:33 piros kernel: SCSI device sdc: drive cache: write back ----------------------------------