Hi, On my 6.0-STABLE #1: Mon Jan 23 00:45:10 EET 2006 while burning a DVD image i got this: Jan 24 09:33:10 it kernel: Interrupt storm detected on "irq20: atapci0"; throttling interrupt source Jan 24 09:33:15 it kernel: ata2: reiniting channel .. Jan 24 09:33:15 it kernel: ata2: SATA connect ready time=0ms Jan 24 09:33:15 it kernel: ata2: sata_connect devices=0x1<ATA_MASTER> Jan 24 09:33:15 it kernel: ata2: reinit done .. Jan 24 09:33:15 it kernel: ad4: TIMEOUT - READ_DMA retrying (1 retry left) LBA=118347775 Jan 24 09:40:20 it kernel: ata2: reiniting channel .. Jan 24 09:40:20 it kernel: ata2: SATA connect ready time=0ms Jan 24 09:40:20 it kernel: ata2: sata_connect devices=0x1<ATA_MASTER> Jan 24 09:40:20 it kernel: ata2: reinit done .. Jan 24 09:40:20 it kernel: ad4: TIMEOUT - READ_DMA retrying (1 retry left) LBA=127662527 Jan 24 09:44:17 it kernel: ata2: reiniting channel .. Jan 24 09:44:17 it kernel: ata2: SATA connect ready time=0ms Jan 24 09:44:17 it kernel: ata2: sata_connect devices=0x1<ATA_MASTER> Jan 24 09:44:17 it kernel: ata2: reinit done .. Jan 24 09:44:17 it kernel: ad4: TIMEOUT - READ_DMA retrying (1 retry left) LBA=133759391 systat -vmstat 1 shows between 400 and 800 interrupts while doing a md5 over a 4GB file on the SATA disk and a few when no big reads are done. On copying a 700 file from the PATA disk there are ~208 interrupts/second (while for the controller I'm copying from they are approx. 1/2 - around 98-107). I haven't seen any bad effects of this in the few hours I'm working with this SATA disk. How worried should I be :) ? atapci0: <VIA 6420 SATA150 controller> port 0xb000-0xb007,0xb400-0xb403,0xb800-0xb807,0xbc00-0xbc03,0xc000-0xc00f,0xc400-0xc4ff irq 20 at device 15.0 on pci 0 atapci0: Reserved 0x10 bytes for rid 0x20 type 4 at 0xc000 atapci0: [MPSAFE] atapci0: Reserved 0x100 bytes for rid 0x24 type 4 at 0xc400 ata2: <ATA channel 0> on atapci0 atapci0: Reserved 0x8 bytes for rid 0x10 type 4 at 0xb000 atapci0: Reserved 0x4 bytes for rid 0x14 type 4 at 0xb400 ata2: SATA connect ready time=0ms ata2: sata_connect devices=0x1<ATA_MASTER> ata2: [MPSAFE] ata3: <ATA channel 1> on atapci0 atapci0: Reserved 0x8 bytes for rid 0x18 type 4 at 0xb800 atapci0: Reserved 0x4 bytes for rid 0x1c type 4 at 0xbc00 ata3: SATA connect status=00000000 ata3: [MPSAFE] atapci1: <VIA 8237 UDMA133 controller> port 0x1f0-0x1f7,0x3f6,0x170-0x177,0x376,0xc800-0xc80f at device 15.1 on pci0 atapci1: Reserved 0x10 bytes for rid 0x20 type 4 at 0xc800 ata0: <ATA channel 0> on atapci1 atapci1: Reserved 0x8 bytes for rid 0x10 type 4 at 0x1f0 atapci1: Reserved 0x1 bytes for rid 0x14 type 4 at 0x3f6 ata0: reset tp1 mask=03 ostat0=50 ostat1=50 ata0: stat0=0x50 err=0x01 lsb=0x00 msb=0x00 ata0: stat1=0x50 err=0x01 lsb=0x00 msb=0x00 ata0: reset tp2 stat0=50 stat1=50 devices=0x3<ATA_SLAVE,ATA_MASTER> ata0: [MPSAFE] ata1: <ATA channel 1> on atapci1 atapci1: Reserved 0x8 bytes for rid 0x18 type 4 at 0x170 atapci1: Reserved 0x1 bytes for rid 0x1c type 4 at 0x376 ata1: reset tp1 mask=03 ostat0=50 ostat1=00 ata1: stat0=0x00 err=0x01 lsb=0x14 msb=0xeb ata1: stat1=0x00 err=0x00 lsb=0x00 msb=0x00 ata1: reset tp2 stat0=00 stat1=00 devices=0x4<ATAPI_MASTER> ata1: [MPSAFE] atapci0@pci0:15:0: class=0x01018f card=0x31491106 chip=0x31491106 rev=0x80 hdr=0x00 vendor = 'VIA Technologies Inc' device = 'VT8237 VT6410 SATA RAID Controller' class = mass storage subclass = ATA atapci1@pci0:15:1: class=0x01018a card=0x50021458 chip=0x05711106 rev=0x06 hdr=0x00 vendor = 'VIA Technologies Inc' device = 'VT82xxxx EIDE Controller (All VIA Chipsets)' class = mass storage subclass = ATA # atacontrol info ata2 Master: ad4 <Maxtor 6L080M0/BACE1G10> Serial ATA v1.0 Slave: no device present # atacontrol mode ad4 current mode = SATA150 # atacontrol cap ad4 Protocol Serial ATA v1.0 device model Maxtor 6L080M0 serial number L21G8EPG firmware revision BACE1G10 cylinders 16383 heads 16 sectors/track 63 lba supported 160086528 sectors lba48 not supported dma supported overlap not supported Feature Support Enable Value Vendor write cache yes yes read ahead yes yes Native Command Queuing (NCQ) yes - 31/0x1F Tagged Command Queuing (TCQ) no no 31/0x1F SMART yes yes microcode download yes yes security yes no power management yes yes advanced power management yes no 0/0x00 automatic acoustic management yes yes 254/0xFE 192/0xC0 -- IOnut - Unregistered ;) FreeBSD "user" "Intellectual Property" is nowhere near as valuable as "Intellect" BOFH excuse #92: Stale file handle (next time use Tupperware(tm)!)