On Fri, 18 Feb 2005 12:20:21 +0100
Timo Sch=F6ler <wanker4freedom@web.de> wrote:

> hi list,
>=20
> i have a 2.0.1-RELEASE system running on a dual PIII machine (IBM=20
> Intellistation which features ECC, might be important?) configured to=20
> run a RAIDframe RAID1.
>=20
> this is the only x86 machine i have, all others are non-x86; i have a=20
> few Sun Ultra 1E and Ultra 2E running in a similar config (also RAID1)=20
> which do not show this or a similar problem.
>=20
> yesterday i tested the RAID config by fiddling around and making one of=20
> the HDs unavailable to the system. all went okay.
>=20
> so i had to rebuild the parity of the RAID set -- so far, so good. out=20
> of a curiosity, i enabled SMART on the HDs (which are both of this type=20
> [1]) to check the drives' temperature(s)...
>=20
> i saw following entry on wd1 while rebuilding the RAID:
>=20
> (...)
> 195 100    0     no  online  positive    Hardware ECC Recovered        =20
> 6171836
> (...)
>=20
> while wd0 showed 0 (zero) errors.
>=20
> after a while (almost 4/5 of the rebuilding done), first errors occured=20
> on wd0 also:
>=20
> (...)
> 195 100    0     no  online  positive    Hardware ECC Recovered        =20
> 24580
> (...)
>=20
> is this something to be worried about? i guess yes :(
>=20
> the drives are brand-new...
>=20
> help is very much appreciated -- tia!
>=20
> [1] -- dmesg output
>=20
> wd0 at atabus0 drive 0: <SAMSUNG SP0812N>
> wd0: drive supports 16-sector PIO transfers, LBA48 addressing
> wd0: 76351 MB, 155127 cyl, 16 head, 63 sec, 512 bytes/sect x 156368016=20
> sectors
> wd0: 32-bit data port
> wd0: drive supports PIO mode 4, DMA mode 2, Ultra-DMA mode 5 (Ultra/100)
>=20
> --=20
> Timo Schoeler | http://macfinity.net/~tis
> //macfinity -- finest IT services | http://macfinity.net
>=20
> There are 10 types of people in the world. Those who understand binary=20
> and those who don't.
>=20
>=20

Hi,

Afaik this counter shows internal ECC recovery in the disk
"as the data comes from the drive heads". Again afaik, this is normal
to occur to some extent in modern GMR-head-based drives.

It has nothing to do with the fact that your computer has ECC main memory.

Cheers,
-Tobias