Robin Hill put forth on 2/4/2011 10:22 AM: > On Fri Feb 04, 2011 at 11:03:30AM -0500, Phillip Susi wrote: > >> FYI, you should get in the habit of using your mail client's reply to >> all function. I did not see this until now because you did not send me >> a copy. >> > I'll make an exception in this case, but I generally reply to messages > on mailing lists to the list only, and I have no plans to change this. > >> On 2/1/2011 4:20 AM, Robin Hill wrote: >>> No, it's RAID 10 or RAID 1+0. RAID 0+1 would be 2 mirrored pairs of >>> 5-disk RAID 0 arrays, in which case you could only lose 5 disks if >> >> In English we read from left to right and top to bottom, so 0+1 means >> stripe on top of mirror. >> > The vast majority of online sources would disagree with you. See: > http://en.wikipedia.org/wiki/Nested_RAID_levels > http://www.aput.net/~jheiss/raid10/ > http://decipherinfosys.wordpress.com/2008/01/15/difference-between-raid-01-vs-raid-10/ > http://www.raid.com/04_01_0_1.html > http://www.pcguide.com/ref/hdd/perf/raid/levels/multLevel01-c.html > http://www.adrc.com/raid-01.html > > The order it's written is the order of creation. RAID0+1 = RAID 0, > then RAID 1 (mirrored stripes) and RAID1+0 = RAID 1, then RAID 0 > (striped mirrors). LSI is the undisputed king of HBA RAID, with all major server OEMs rebadging LSI cards and/or using their storage processor chips on the mobo, including Dell, HP, IBM, Intel, Sun, etc. Note the diagram at the bottom of this PDF showing the layout of RAID 10: http://www.lsi.com/DistributionSystem/AssetDocument/SCG_LSI_SAS_6Gbps_IR_PB_092909.pdf It clearly shows a stripe over two mirrors. -- Stan -- 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
