Re: Karel, some followup Q:s on your RAID1C patch

2016-02-02 Thread Karel Gardas
> I have one more question about RAID1C: > > Does it have any feature for load-balancing of read operations between the > different underlying media? RAID1C is just modified RAID1, so man softraid -- and read and also read https://en.wikipedia.org/wiki/Standard_RAID_levels#RAID_1 > E.g. evenly sp

Re: Karel, some followup Q:s on your RAID1C patch

2016-02-02 Thread Tinker
On 2016-02-02 01:23, Karel Gardas wrote: Tinker, adding block number to sector data and calculate chksum over this should be relatively easy. I'll ping you once I send another WIP patch to tech@ so you will get a chance to hack on it... Besides this, I've observed you are huge fan of ZFS. Perhap

Re: Karel, some followup Q:s on your RAID1C patch

2016-02-01 Thread Karel Gardas
Tinker, adding block number to sector data and calculate chksum over this should be relatively easy. I'll ping you once I send another WIP patch to tech@ so you will get a chance to hack on it... Besides this, I've observed you are huge fan of ZFS. Perhaps even better for you may be to work on pro

Re: Karel, some followup Q:s on your RAID1C patch

2016-02-01 Thread Tinker
Janne, ZFS includes the sector number in the checksum input because that provides a safeguard against any form of disk breakdown. Most filesystems except for ZFS are susceptible to this kind of error because either it's not checksummed, or the checksums are locally stored so data relocations