Re: avoiding the initial resync on --create

2006-10-09 Thread Erik Mouw
s with --assume-clean just before slapping a filesystem on > them and installing the system, do you see any potential problems? If you want to speed up the initial install, I'd say it's better to create the array with one missing drive, install the system and let it resync upon the n

Re: Recipe for Mirrored OS Drives

2006-10-03 Thread Erik Mouw
ight also be useful. Erik -- +-- Erik Mouw -- www.harddisk-recovery.com -- +31 70 370 12 90 -- | Lab address: Delftechpark 26, 2628 XH, Delft, The Netherlands - To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to [EMAIL PROTECTED] More m

Re: RAID5E

2006-05-31 Thread Erik Mouw
ith RAID6) - Higher throughput compared to standard RAID5 - Actually uses the hot spare Disadvantage: - Doesn't protect against double disk failures, but RAID5 also doesn't Note that you could also do RAID6E. Erik -- +-- Erik Mouw -- www.harddisk-recovery.com -- +31 70 370 12 90 -- |

Re: Two-disk RAID5?

2006-05-05 Thread Erik Mouw
On Thu, May 04, 2006 at 09:18:57PM -0400, Bill Davidsen wrote: > Erik Mouw wrote: > >No, the other way around: RAID1 is a special case of RAID5. > > > No it isn't. If you have N drives in RAID1 you have N independent copies > of the data and no parity, there's just

Re: Two-disk RAID5?

2006-05-01 Thread Erik Mouw
ecovery tools can handle that just fine. Erik [1] Yes, there's also an algorithm to select which disk is used for parity for what block, but that doesn't change the way *how* parity is calculated. -- +-- Erik Mouw -- www.harddisk-recovery.com -- +31 70 370 12 90 -- | Lab address: Delftechp

Re: Cheap Clustered FS

2006-04-13 Thread Erik Mouw
unted by several hosts and (should) have caching and locking issues covered. Erik -- +-- Erik Mouw -- www.harddisk-recovery.com -- +31 70 370 12 90 -- | Lab address: Delftechpark 26, 2628 XH, Delft, The Netherlands - To unsubscribe from this list: send the line "unsubscribe linux-

Re: NVRAM support

2006-02-14 Thread Erik Mouw
On Mon, Feb 13, 2006 at 11:54:44AM +, Andy Smith wrote: > On Mon, Feb 13, 2006 at 10:22:04AM +0100, Erik Mouw wrote: > > On Fri, Feb 10, 2006 at 05:02:02PM -0800, dean gaudet wrote: > > > it doesn't seem to make any sense at all to use a non-volatile external > >

Re: NVRAM support

2006-02-13 Thread Erik Mouw
On Fri, Feb 10, 2006 at 05:02:02PM -0800, dean gaudet wrote: > On Fri, 10 Feb 2006, Bill Davidsen wrote: > > Erik Mouw wrote: > > > You could use it for an external journal, or you could use it as a swap > > > device. > > > > > > > Let me concur,

Re: NVRAM support

2006-02-10 Thread Erik Mouw
nal journal, or you could use it as a swap device. > What changes would be required? None, ext3 supports external journals. Look for the -O option in the mke2fs manual page. Using the NVRAM device as swap is not different from a using "normal" swap partition. Erik -- +-- Erik Mouw

Re: raid 0 read performance

2005-12-29 Thread Erik Mouw
On Thu, Dec 29, 2005 at 01:32:25PM +0200, Raz Ben-Jehuda(caro) wrote: > what "wrt" stands for ? "with respect to", see http://www.google.com/search?q=what+is+wrt . Erik -- +-- Erik Mouw -- www.harddisk-recovery.com -- +31 70 370 12 90 -- | Lab address: Delftechpark