Re[2]: [zfs-discuss] Re: ZFS checksum error detection

2007-04-09 Thread Robert Milkowski
Hello Ricardo, Friday, April 6, 2007, 5:33:14 AM, you wrote: RC> Isn't it more likely that these are errors on data as well? I think zfs RC> retries read operations when there's a checksum failure, so maybe these RC> are transient hardware problems (faulty cables, high temperature..)? RC> This w

Re: [zfs-discuss] Re: ZFS checksum error detection

2007-04-05 Thread Ricardo Correia
Isn't it more likely that these are errors on data as well? I think zfs retries read operations when there's a checksum failure, so maybe these are transient hardware problems (faulty cables, high temperature..)? This would explain the non-existence of unrecoverable errors. Robert Milkowski wrote

Re[5]: [zfs-discuss] Re: ZFS checksum error detection

2007-03-28 Thread Robert Milkowski
Hello Robert, Thursday, March 29, 2007, 12:37:28 AM, you wrote: RM> Hello Robert, RM> Wednesday, March 21, 2007, 10:36:15 AM, you wrote: RM>> Hello Robert, RM>> Saturday, March 17, 2007, 6:49:05 PM, you wrote: RM>>> Hello Thomas, RM>>> Saturday, March 17, 2007, 11:46:14 AM, you wrote: TN>>>

Re[4]: [zfs-discuss] Re: ZFS checksum error detection

2007-03-28 Thread Robert Milkowski
Hello Robert, Wednesday, March 21, 2007, 10:36:15 AM, you wrote: RM> Hello Robert, RM> Saturday, March 17, 2007, 6:49:05 PM, you wrote: RM>> Hello Thomas, RM>> Saturday, March 17, 2007, 11:46:14 AM, you wrote: TN>>> On Fri, 16 Mar 2007, Anton B. Rang wrote: It's possible (if unlikely) th

Re[3]: [zfs-discuss] Re: ZFS checksum error detection

2007-03-21 Thread Robert Milkowski
Hello Robert, Saturday, March 17, 2007, 6:49:05 PM, you wrote: RM> Hello Thomas, RM> Saturday, March 17, 2007, 11:46:14 AM, you wrote: TN>> On Fri, 16 Mar 2007, Anton B. Rang wrote: >>> It's possible (if unlikely) that you are only getting checksum errors on >>> metadata. Since ZFS always inte

Re[2]: [zfs-discuss] Re: ZFS checksum error detection

2007-03-17 Thread Robert Milkowski
Hello Thomas, Saturday, March 17, 2007, 11:46:14 AM, you wrote: TN> On Fri, 16 Mar 2007, Anton B. Rang wrote: >> It's possible (if unlikely) that you are only getting checksum errors on >> metadata. Since ZFS always internally mirrors its metadata, even on >> non-redundant pools, it can recover

Re: [zfs-discuss] Re: ZFS checksum error detection

2007-03-17 Thread Thomas Nau
On Fri, 16 Mar 2007, Anton B. Rang wrote: It's possible (if unlikely) that you are only getting checksum errors on metadata. Since ZFS always internally mirrors its metadata, even on non-redundant pools, it can recover from metadata corruption which does not affect all copies. (If there is onl

[zfs-discuss] Re: ZFS checksum error detection

2007-03-16 Thread Anton B. Rang
It's possible (if unlikely) that you are only getting checksum errors on metadata. Since ZFS always internally mirrors its metadata, even on non-redundant pools, it can recover from metadata corruption which does not affect all copies. (If there is only one LUN, the mirroring happens at differe