----- "James Olin Oden" <james.oden at gmail.com> escreveu: > For quite some time I've used raid 1 as a means of providing a > rollback mechanism for an upgrade (which I learned from others long > ago). So essentially, before an upgrade you split the mirrors and > upgrade one side or the other. If your upgrade goes well you sync > one way, if your upgrade does not you sync the other (much hand waving > and chanting going on, as its more complicated than that, but that is the > essence of the solution). Nice, I didn't think on this before... Will make a try :) > Recently, I was asked to do the same thing but with a raid 1+0 > solution. Its easy, enough to break the raid 1 volumes underneath, > but then how do I use the broke off volumes to form the duplicate strip. > Pictures may help. > We start off looking like: > > /----------- Raid 0 Volume ----------\ > | [disk 0]<---R 1--->[disk 2] | > | | > | [disk 1]<---R 1--->[disk 3] | > \--------------------------------------------/ > > > What we want to go to is: > > /--- Raid 0 ---\ /--- Raid 0 ---\ > | [disk 0] | | [disk 2] | > | | | | > | [disk 1] | | [disk 3] | > \-----------------/ \------------------/ > Old System New System > > Is this possible with the current set of mdadm tools? Humm... didn't know if it's possible, but IMHO it'll be much easier to do if you use a 0+1 RAID instead of a 1+0 schema :) Antonio. -- +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Antonio S. Martins Jr. - Support Analist | "Only The Shadow Knows | | Universidade Estadual de Maringá - Brasil| what evil lurks in the | | NPD - Núcleo de Processamento de Dados | Heart of Men!" | | E-Mail: asmartins at uem.br / shadow at uem.br | !!! Linux User: 52392 !!! | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ -- Esta mensagem foi verificada pelo sistema de antivírus e acredita-se estar livre de perigo.