Dotaz: zpomaleny disk

[hr]

Ahoj vsem!

Mam stroj (Intel D975XBX2) se SATA-II radici a SATA-II disky (Segate ST3500630NS). Disky normalne vykazuji rychlost cteni ( hdparm -t /dev/sdx ) kolem 75MBps. Jednou jsem ale potreboval jeden z disku dat na jiny radic (SiI 3114) a na nem jel pouze cca 50MBps, coz je logicke. Co ale nechapu, ze kdyz TENTO disk vratim na SATA-II radic, takze i po prihlaseni se jako SATA-II stale drzi rychlost (resp. pomalost) 50. Pokud vezmu jiny disk a zamenim jej s timto "zblblym", rychlosti se tez zameni. Disky jsou dle dmesg prihlaseny uplne stejne, jen ten jeden jede o tretinu pomaleji. Zkousel jsem jej jumperem prepnout na SATA-I, nabootovat, vypnout, prepnout na SATA-II a stale jede jen 50MBps. Vypada to, jako by mel neco zapsane na sobe, ale nevim kde a jak se toho zbavit -(

Predem dekuji vsem za inspiraci.

lspci:

00:00.0 Host bridge: Intel Corporation 82975X Memory Controller Hub

00:1b.0 Audio device: Intel Corporation 82801G (ICH7 Family) High Definition Audio Controller (rev 01)

00:1c.0 PCI bridge: Intel Corporation 82801G (ICH7 Family) PCI Express Port 1 (rev 01)

00:1c.4 PCI bridge: Intel Corporation 82801GR/GH/GHM (ICH7 Family) PCI Express Port 5 (rev 01)

00:1c.5 PCI bridge: Intel Corporation 82801GR/GH/GHM (ICH7 Family) PCI Express Port 6 (rev 01)

00:1d.0 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI Controller #1 (rev 01)

00:1d.1 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI Controller #2 (rev 01)

00:1d.2 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI Controller #3 (rev 01)

00:1d.3 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI Controller #4 (rev 01)

00:1d.7 USB Controller: Intel Corporation 82801G (ICH7 Family) USB2 EHCI Controller (rev 01)

00:1e.0 PCI bridge: Intel Corporation 82801 PCI Bridge (rev e1)

00:1f.0 ISA bridge: Intel Corporation 82801GH (ICH7DH) LPC Interface Bridge (rev 01)

00:1f.1 IDE interface: Intel Corporation 82801G (ICH7 Family) IDE Controller (rev 01)

00:1f.2 SATA controller: Intel Corporation 82801GR/GH (ICH7 Family) SATA AHCI Controller (rev 01)

00:1f.3 SMBus: Intel Corporation 82801G (ICH7 Family) SMBus Controller (rev 01)

02:00.0 SATA controller: Marvell Technology Group Ltd. 88SE6145 SATA II PCI-E controller (rev a1)

03:00.0 Ethernet controller: Intel Corporation 82573L Gigabit Ethernet Controller

04:00.0 VGA compatible controller: S3 Inc. 86c764/765 [Trio32/64/64V+] (rev 54)

04:02.0 RAID bus controller: Silicon Image, Inc. SiI 3114 [SATALink/SATARaid] Serial ATA Controller (rev 02)

04:04.0 FireWire (IEEE 1394): Texas Instruments TSB43AB23 IEEE-1394a-2000 Controller (PHY/Link)

dmesg:

scsi0 : ahci

scsi1 : ahci

scsi2 : ahci

scsi3 : ahci

ata1: SATA max UDMA/133 cmd 0xf882c100 ctl 0x00000000 bmdma 0x00000000 irq 223

ata2: SATA max UDMA/133 cmd 0xf882c180 ctl 0x00000000 bmdma 0x00000000 irq 223

ata3: SATA max UDMA/133 cmd 0xf882c200 ctl 0x00000000 bmdma 0x00000000 irq 223

ata4: SATA max UDMA/133 cmd 0xf882c280 ctl 0x00000000 bmdma 0x00000000 irq 223

ata1: SATA link up 3.0 Gbps (SStatus 123 SControl 300)

ata1.00: ATA-7: ST3500630NS, 3.AEG, max UDMA/133

ata1.00: 976773168 sectors, multi 16: LBA48 NCQ (depth 31/32)

ata1.00: configured for UDMA/133

ata2: SATA link up 3.0 Gbps (SStatus 123 SControl 300)

ata2.00: ATA-7: ST3500630NS, 3.AEG, max UDMA/133

ata2.00: 976773168 sectors, multi 16: LBA48 NCQ (depth 31/32)

ata2.00: configured for UDMA/133

ata3: SATA link up 3.0 Gbps (SStatus 123 SControl 300)

ata3.00: ATA-7: ST3500630NS, 3.AEG, max UDMA/133

ata3.00: 976773168 sectors, multi 16: LBA48 NCQ (depth 31/32)

ata3.00: configured for UDMA/133

Odpovědi

[Crusoe]

Uz neviem ktory vyvojar jadra sa vyjadril ze Seagate + Sillicon Image zla kombinacia. (Bohuzial ja mam tiez tu istu kombinaciu). Chcelo by to skusit experimentalne ovladace , su napriklad v Zenwalku alebo v roznych ,,gentoo" jadrach ako viper,cjk,nitro. Aku mas distribuciu ? Neskusal si prepnut niektory z parametrov cez hdparm alebo sdparm ?

[hr]

Oba tyto disky jsou na stejnem radici (intel) a dela to toto: hdparm -tT /dev/sdc

/dev/sdc: Timing cached reads: 19640 MB in 2.00 seconds = 9839.49 MB/sec

Timing buffered disk reads: 156 MB in 3.02 seconds = 51.58 MB/sec

hdparm -tT /dev/sdb

/dev/sdb: Timing cached reads: 17336 MB in 2.00 seconds = 8682.41 MB/sec Timing buffered disk reads: 224 MB in 3.00 seconds = 74.62 MB/sec

Sil radic s tim jiz nema co delat (snad), neni pouzity a neni ani zakompilovan v jadre (2.6.23-rc1). Pokud ty disky prohodim sdb za sdc, prohodi se i rychlosti...