Hello all. I'am observing this problem for about a month. I have a server (Intel(R) Core(TM)2 Duo CPU E4500 2.20GHz, Supermicro PDSBM) configured with two identical drives (both in SATA150 mode) and running gmirror: ATA channel 0: Master: ad0 <ST3160815AS/3.AAD> Serial ATA II ATA channel 1: Master: ad2 <ST3160815AS/3.AAD> Serial ATA II And always after some period of time one of the drives becoming a bottle neck, due to very slow speed. I can see this in very simple test with dd: ~# dd if=/dev/zero of=test bs=1m count=10 10+0 records in 10+0 records out 10485760 bytes transferred in 13.529272 secs (775042 bytes/sec) dT: 5.026s w: 5.000s L(q) ops/s r/s kBps ms/r w/s kBps ms/w %busy Name 30 8 0 0 0.0 8 1044 510.4 101.0| ad0 30 8 0 0 0.0 8 1044 510.5 101.0| mirror/gm0 0 0 0 0 0.0 0 0 0.0 0.0| ad0s1 30 8 0 0 0.0 8 1044 510.5 101.0| mirror/gm0s1 0 9 0 0 0.0 9 1146 1.5 0.6| ad2 If you can see ad0 is very busy in this test. The speed and latency is very ugly. I've already changed the motherboard(to the same model), tested new BIOS, new drive instead of ad0 and analyzed SMART values, but found nothing strange. Also the drive work like this regardless of the presence in gmirror array. Did some one see any problems like this? Here is some additional information: FreeBSD cassini 7.0-RC1 FreeBSD 7.0-RC1 #0: Thu Feb 7 18:48:35 EET 2008 root_at_cassini:/usr/obj/usr/src/sys/GENERIC amd64 Geom name: gm0 State: COMPLETE Components: 2 Balance: round-robin Slice: 4096 Flags: NONE GenID: 1 SyncID: 4 ID: 1667795477 Providers: 1. Name: mirror/gm0 Mediasize: 160040803328 (149G) Sectorsize: 512 Mode: r6w6e7 Consumers: 1. Name: ad0 Mediasize: 160041885696 (149G) Sectorsize: 512 Mode: r1w1e1 State: ACTIVE Priority: 0 Flags: DIRTY GenID: 1 SyncID: 4 ID: 653888114 2. Name: ad2 Mediasize: 160041885696 (149G) Sectorsize: 512 Mode: r1w1e1 State: ACTIVE Priority: 0 Flags: DIRTY GenID: 1 SyncID: 4 ID: 1400722162 root_at_cassini:~# pciconf -vl hostb0_at_pci0:0:0:0: class=0x060000 card=0xb58015d9 chip=0x29708086 rev=0x02 hdr=0x00 vendor = 'Intel Corporation' device = '946GZ/PL/GL Processor to I/O Controller' class = bridge subclass = HOST-PCI vgapci0_at_pci0:0:2:0: class=0x030000 card=0xb58015d9 chip=0x29728086 rev=0x02 hdr=0x00 vendor = 'Intel Corporation' device = '946GZ/GL Integrated Graphics Controller' class = display subclass = VGA pcib1_at_pci0:0:28:0: class=0x060400 card=0xb58015d9 chip=0x27d08086 rev=0x01 hdr=0x01 vendor = 'Intel Corporation' device = '82801G (ICH7 Family) PCIe Root Port' class = bridge subclass = PCI-PCI pcib2_at_pci0:0:28:4: class=0x060400 card=0xb58015d9 chip=0x27e08086 rev=0x01 hdr=0x01 vendor = 'Intel Corporation' device = '82801GR/GH/GHM (ICH7 Family) PCIe Root Port' class = bridge subclass = PCI-PCI pcib3_at_pci0:0:28:5: class=0x060400 card=0xb58015d9 chip=0x27e28086 rev=0x01 hdr=0x01 vendor = 'Intel Corporation' device = '82801GR/GH/GHM (ICH7 Family) PCIe Root Port' class = bridge subclass = PCI-PCI uhci0_at_pci0:0:29:0: class=0x0c0300 card=0xb58015d9 chip=0x27c88086 rev=0x01 hdr=0x00 vendor = 'Intel Corporation' device = '82801G (ICH7 Family) USB Universal Host Controller' class = serial bus subclass = USB uhci1_at_pci0:0:29:1: class=0x0c0300 card=0xb58015d9 chip=0x27c98086 rev=0x01 hdr=0x00 vendor = 'Intel Corporation' device = '82801G (ICH7 Family) USB Universal Host Controller' class = serial bus subclass = USB uhci2_at_pci0:0:29:2: class=0x0c0300 card=0xb58015d9 chip=0x27ca8086 rev=0x01 hdr=0x00 vendor = 'Intel Corporation' device = '82801G (ICH7 Family) USB Universal Host Controller' class = serial bus subclass = USB uhci3_at_pci0:0:29:3: class=0x0c0300 card=0xb58015d9 chip=0x27cb8086 rev=0x01 hdr=0x00 vendor = 'Intel Corporation' device = '82801G (ICH7 Family) USB Universal Host Controller' class = serial bus subclass = USB ehci0_at_pci0:0:29:7: class=0x0c0320 card=0xb58015d9 chip=0x27cc8086 rev=0x01 hdr=0x00 vendor = 'Intel Corporation' device = '82801G (ICH7 Family) USB 2.0 Enhanced Host Controller' class = serial bus subclass = USB pcib4_at_pci0:0:30:0: class=0x060401 card=0xb58015d9 chip=0x244e8086 rev=0xe1 hdr=0x01 vendor = 'Intel Corporation' device = '82801 Family (ICH2/3/4/4/5/5/6/7/8/9,63xxESB) Hub Interface to PCI Bridge' class = bridge subclass = PCI-PCI isab0_at_pci0:0:31:0: class=0x060100 card=0xb58015d9 chip=0x27b88086 rev=0x01 hdr=0x00 vendor = 'Intel Corporation' device = '945GL Intel 82801GB/GR (ICH7 Family) LPC Interface Controller - 27B8' class = bridge subclass = PCI-ISA atapci0_at_pci0:0:31:2: class=0x01018a card=0xb58015d9 chip=0x27c08086 rev=0x01 hdr=0x00 vendor = 'Intel Corporation' device = '82801GB/GR/GH (ICH7 Family) Serial ATA Storage Controller' class = mass storage subclass = ATA none0_at_pci0:0:31:3: class=0x0c0500 card=0xb58015d9 chip=0x27da8086 rev=0x01 hdr=0x00 vendor = 'Intel Corporation' device = '82801G (ICH7 Family) SMBus Controller' class = serial bus subclass = SMBus em0_at_pci0:6:0:0: class=0x020000 card=0x109a15d9 chip=0x109a8086 rev=0x00 hdr=0x00 vendor = 'Intel Corporation' device = '82573L Intel PRO/1000 PL Network Adaptor' class = network subclass = ethernet -- ====================================================================== - Best regards, Nikolay Pavlov. <<<----------------------------------- ======================================================================Received on Fri Feb 15 2008 - 15:52:02 UTC
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