On Sat, Oct 24, 2009 at 5:12 AM, Andy Campbell
<fedora@xxxxxxxxxxxxxxxxxxxxx> wrote:
> I've noticed that an external eSATA drive I use for backups
> gets downgraded to 1.5Gbs, with errors when I boot.
>
> + I'm running Fedora 11 (64bit ).
> + The eSATA port is from a JMicron JMB361, which is also used
> for two PATA DVD drives - if that makes any difference.
> + The drive is an Icy Box - Ib-390stus-b enclosure.
> + In the BIOS, I've select AHCI.
> + I've tried booting with noapic acpi=off
> + The drive seems to work fine at 1.5GBps, but I'd
> rather have the full speed its capable off.
>
>
> Any ideas on the meaning of the errors ...
>
> [trantor] ~ $dmesg | grep ata7
>
> ata7: SATA max UDMA/133 abar m8192@0xfeafe000 port 0xfeafe100 irq 10
> ata7: SATA link up 3.0 Gbps (SStatus 123 SControl 300)
> ata7.00: ATA-8: WDC WD10EACS-00D6B1, 01.01A01, max UDMA/133
> ata7.00: 1953525168 sectors, multi 0: LBA48 NCQ (depth 31/32)
> sda:<6>ata7.00: configured for UDMA/133
> sde:<3>ata7.00: exception Emask 0x10 SAct 0x1 SErr 0x780100 action 0x6
> ata7.00: irq_stat 0x08000000
>
> ata7: SError: { UnrecovData 10B8B Dispar BadCRC Handshk }
^
|
This says that your controller and external drive can not reliably
communicate at 3Gbps.
Things to do to troubleshoot problem:
1. Make sure that your computer and external drive have proper
electrical ground. Suggest both be plugged into same electrical outlet
or power strip. Use a tester (it's a three prong device with three
indicator lights) to verify that the AC is wired correctly.
2. Check your cable. Is it the proper length, in good condition,
making good connection, etc.?
3. Exchange or replace the cable.
4. Test your drive on a different computer.
> ata7.00: cmd 60/08:00:00:00:00/00:00:00:00:00/40 tag 0 ncq 4096 in
> ata7.00: status: { DRDY }
> ata7: hard resetting link
>
> ata7: SATA link up 3.0 Gbps (SStatus 123 SControl 300)
> ata7.00: failed to IDENTIFY (I/O error, err_mask=0x100)
> ata7.00: revalidation failed (errno=-5)
> ata7: hard resetting link
>
> ata7: SATA link up 3.0 Gbps (SStatus 123 SControl 300)
> ata7.00: configured for UDMA/133
> ata7: EH complete
>
> ata7: limiting SATA link speed to 1.5 Gbps
> ata7.00: exception Emask 0x10 SAct 0x1 SErr 0x780100 action 0x6
> ata7.00: irq_stat 0x08000000
> ata7: SError: { UnrecovData 10B8B Dispar BadCRC Handshk }
> ata7.00: cmd 60/08:00:00:00:00/00:00:00:00:00/40 tag 0 ncq 4096 in
> ata7.00: status: { DRDY }
> ata7: hard resetting link
>
> ata7: SATA link up 1.5 Gbps (SStatus 113 SControl 310)
> ata7.00: configured for UDMA/133
> ata7: EH complete
>
>
> Thanks
> Andy
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