On Tue, November 10, 2009 1:39 am, Doug Ledford wrote: > On 11/06/2009 01:45 AM, Neil Brown wrote: >> >> Greetings. >> >> About a week ago I released mdadm-3.1 >> I have now 'withdrawn' it meaning that it doesn't appear on the >> kernel.org mirrors any more, and I ask people not to use it. > > Although the cause for this sucks, I was actually going to suggest that > since 3.1 is a version bump, that we take the opportunity to change a > few defaults. Like switching to version 1 superblocks instead of > version 0 by default. And changing the default chunk size to 512k > instead of 64k. The time has simply come for the 0->1 superblock > change, and I have a good deal of data showing that for SATA disks at > least, the 512k chunk size is the typical sweet spot. I had been toying with that idea myself - certainly of changing the defaults soon. I'm tempted to make the default metadata "1.1" though possibly not for RAID1. For RAID0,4,5,6,10 there is no value in having the metadata at the end of the device. For RAID1 there is as it makes booting off any member easier. Thoughts? I'm certainly happy with increasing the chunksize to 512K. NeilBrown -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
