I read some posts before says 3ware's hardware raid is doing bad block remapping, which is transparent to file system. I was wondering if md is doing the same way. I am trying hardware raid 1+0 now, even it will lost half of the disk space, but if it is stable and fast, I will go for it. Donghui ----- Original Message ----- From: "Martin Dohmen" <md@tripnet.se> To: "'Donghui Wen'" <dhwen@protegonetworks.com>; <linux-raid@vger.kernel.org> Sent: Wednesday, February 04, 2004 11:35 PM Subject: Re: badblock handling I have seen the same problem, but I have also noticed that if I use the 3ware cards own raid5 instead of md things work diffrently, the only thing that seems to happen when a disk develops a bad block is this in the log: 3w-xxxx: scsi0: AEN: ERROR: Drive error: Port #6. 3w-xxxx: scsi0: AEN: WARNING: Sector repair occurred: Port #6. I do not now if 3ware sets some block asside when the raid is created for use when errors occure or if they justs writes the block agan and the disk does the realocation by it self. The downside of using 3ware raid5 is that performance is quite much lower than with md, with 8 disks I get 90MB/s with md and 40MB/s with 3ware in writespeed. --On den 4 februari 2004 20:45 -0800 Donghui Wen <dhwen@protegonetworks.com> wrote: > Hi, > I am running a server with Linux software-raid (3ware controller). > But from time to time, > a disk is kicked out by md. This will happen when 3ware card reports a > unrecovered read error > for a sector. But when I run raidhotadd, the disk can added back to raid > with no problem. > So my questions are: > (1) Will md kick out one disk if it find out ONE bad block? > (2) Is it possible to set up a threshold, only the amount of bad > blocks pass this threshold, > the disk will be kicked out. > (3) Is it possible to remap the bad blocks to some spare blocks > automatically on the fly? > > Thanks! > > Donghui > > - > To unsubscribe from this list: send the line "unsubscribe linux-raid" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > Med vänlig hälsning TRIPNET AB Martin Dohmen ________________________________________________________________________ Tripnet AB Besöksadress: Telefon: 031-725 25 00 Box 5071 Åvägen 42 Telefax: 031-725 25 01 402 22 GÖTEBORG GÖTEBORG Direkt: 031-725 25 11 http://www.tripnet.se dohmen@tripnet.se Mobil: 0733-58 25 11 - To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html - To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
