Make sure the cables aren't going close parallel to each other.
Interference can be expected then. If needed, you can apply (grounded)
aluminium foil or conductive tapes on both the flat sides of the cables.
> > Also, four 160GB disks eat power!
>
> Well, these disks (4G160J8) are 5400rpm, They spin up just fine
> and according to spec they each use under 300ma@12v and 400ma@5v
> (active, 5.2W actually) which is not that much.
>
> This is not to say that just because the power supply can deliver
> the power, the power is clean enough.
You can check with a scope, or at least with on-board HW monitor.
> > I have a box dual athlon similar setup w/ 460W ps
> > I have to wait for the PS to warm up or there is not enough juice to
> > properly spin up the last drive. However if I replace the four 160GB's
> > with four 20GB Seagate's no problem.
>
> A bootup is always clean, and when not stressed it can go for a long
> while
> without any errors. However once pushed I start seeing these failures.
On what controllers do you see the failures? Only the onboard or also
on the addon cards? They're UDMA transfer errors - correctable by
retrying.
> > You are going to need at least a 400W PS w/ almost no ripple to make it
> > work. If you have this then check the cable routing.
> >
> > Also hdparm -i /dev/hdX to see if their transfer rates are reduced.
>
> I will check the situation. I know they come up ATA-5. Here are the
> relevant bootup messages:
>
> Uniform Multi-Platform E-IDE driver Revision: 6.31
> ide: Assuming 33MHz system bus speed for PIO modes; override with
> idebus=xx
> VP_IDE: IDE controller on PCI bus 00 dev 39
> VP_IDE: chipset revision 6
> VP_IDE: not 100% native mode: will probe irqs later
> ide: Assuming 33MHz system bus speed for PIO modes; override with
> idebus=xx
> VP_IDE: VIA vt82c686b (rev 40) IDE UDMA100 controller on pci00:07.1
> ide0: BM-DMA at 0xffa0-0xffa7, BIOS settings: hda:DMA, hdb:pio
> ide1: BM-DMA at 0xffa8-0xffaf, BIOS settings: hdc:DMA, hdd:DMA
> CMD649: IDE controller on PCI bus 00 dev 50
> PCI: Found IRQ 5 for device 00:0a.0
> CMD649: chipset revision 1
> CMD649: not 100% native mode: will probe irqs later
> CMD649: ROM enabled at 0xdff00000
> ide2: BM-DMA at 0xc000-0xc007, BIOS settings: hde:pio, hdf:pio
> ide3: BM-DMA at 0xc008-0xc00f, BIOS settings: hdg:pio, hdh:pio
> CMD649: IDE controller on PCI bus 00 dev 60
> PCI: Found IRQ 12 for device 00:0c.0
> CMD649: chipset revision 2
> CMD649: not 100% native mode: will probe irqs later
> CMD649: ROM enabled at 0xdfe80000
> ide4: BM-DMA at 0xac00-0xac07, BIOS settings: hdi:pio, hdj:pio
> ide5: BM-DMA at 0xac08-0xac0f, BIOS settings: hdk:pio, hdl:pio
> hda: WDC WD600BB-00BSA0, ATA DISK drive
> hdc: WDC WD600BB-00BSA0, ATA DISK drive
> hdd: ATAPI CD ROM DRIVE 50X MAX, ATAPI CD/DVD-ROM drive
> hde: Maxtor 4G160J8, ATA DISK drive
> hdg: Maxtor 4G160J8, ATA DISK drive
> hdi: Maxtor 4G160J8, ATA DISK drive
> hdk: Maxtor 4G160J8, ATA DISK drive
> ide0 at 0x1f0-0x1f7,0x3f6 on irq 14
> ide1 at 0x170-0x177,0x376 on irq 15
> ide2 at 0xd000-0xd007,0xcc02 on irq 5
> ide3 at 0xc800-0xc807,0xc402 on irq 5
> ide4 at 0xbc00-0xbc07,0xb802 on irq 12
> ide5 at 0xb400-0xb407,0xb002 on irq 12
> hda: 117231408 sectors (60022 MB) w/2048KiB Cache, CHS=7297/255/63,
> UDMA(100)
> hdc: 117231408 sectors (60022 MB) w/2048KiB Cache, CHS=116301/16/63,
> UDMA(100)
> hde: 320173056 sectors (163929 MB) w/2048KiB Cache, CHS=19929/255/63,
> UDMA(100)
> hdg: 320173056 sectors (163929 MB) w/2048KiB Cache, CHS=19929/255/63,
> UDMA(100)
> hdi: 320173056 sectors (163929 MB) w/2048KiB Cache, CHS=19929/255/63,
> UDMA(100)
> hdk: 320173056 sectors (163929 MB) w/2048KiB Cache, CHS=19929/255/63,
> UDMA(100)
>
> > Cheers,
> >
> > Andre Hedrick
> > LAD Storage Consulting Group
> >
> > On Sun, 24 Mar 2002, Eyal Lebedinsky wrote:
> >
> > > I have six disks in the machine, each a master on the cable. Two are
> > > on the on-board controller and Four are on two PCI ATA-100 cards.
> > >
> > > I am getting disk error (BadCRC) on all disks, intermittently.
> > >
> > > I upgraded from RH 2.4.9 (with SGI xfs) to 2.4.18+xfs. Same problem.
> > > I then applied the 2.4.18-rc1 IDE patches with no improvement (well,
> > > the four 160GB disks are now fully visible and not clipped to 28bits
> > > which is a nice surprise).
> > >
> > > I checked the memory, replaced the power supply with a hefty 400W,
> > > I even used a recent mobo (Gigabyte GA-6VTXE). No beef, practically
> > > the same rate of errors.
> > >
> > > I do not believe all six cables are bad (80w all). This is a UP, and
> > > I did not enalbe local APIC. Should I?
> > >
> > > Any ideas where to go from here? On request I have boot messages
> > > (with errors) and lspci output - I prefer not to overload the list.
> > >
> > > The setup is two WD 60GB disks (hda/hdc) which host the root fs (ext2)
> > > a working area (md2=RAID0, most of the space) and an xfs log
> > > (md1=RAID1).
> > >
> > > hde/g/i/k are Maxtor 160GB, RAID5, xfs (with external log on md0).
> > >
> > > I get errors intermittently on all, here is an example after a boot
> > > following the creation of the raid5 (so a sync was running for about
> > > two hours).
> > >
> > > hda: dma_intr: status=0x51 { DriveReady SeekComplete Error }
> > > hda: dma_intr: error=0x84 { DriveStatusError BadCRC }
> [errors trimmed]
>
> --
> Eyal Lebedinsky (eyal@eyal.emu.id.au) <http://samba.org/eyal/>
> -
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-- Vojtech Pavlik SuSE Labs - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/