mirror

[Furnish, Trever G]

Another excellent link:
http://togami.com/~warren/guides/remoteraidcrazies/
 

> -----Original Message-----
> From: redhat-list-bounces at redhat.com 
> [mailto:redhat-list-bounces at redhat.com] On Behalf Of Furnish, Trever G
> Sent: Thursday, May 17, 2007 4:49 PM
> To: General Red Hat Linux discussion list
> Subject: RE: mirror
> 
> Don't know anything about that particular hardware, but it 
> looks like it has a hardware raid controller -- can't you 
> just mirror using that?  If so, that'll be your best 
> performance choice.  The only headache there is that you will 
> also need some mechanism for knowing when drives behind the 
> raid controller fail, which usually means you're out of luck 
> unless the vendor has released Linux tools to notify you of 
> that stuff.  HP provides such tools for all of their 
> supported hardware, no clue about IBM.
> 
> You didn't mention the version of Linux you're using either.  
> The mirroring choices available differ depending on version.  
> In RHEL3 it's pretty much just md or some commercial package 
> as your choice, unless you want to replace lvm with lvm2 or 
> evfs.  Md works fine.  In RHEL4 and
> RHEL5 you have lvm2 with mirroring as a choice, although for 
> all I know it may still just be implemented via md.  
> Mirroring the entire disk (including /, /boot, and /bin) can 
> be done with md, not sure about the other tools (probably can 
> be done with them too though).
> 
> Some links:
> http://fy.chalmers.se/~appro/linux/HOWTO-mirror-root.html
> http://www.jukie.net/~bart/blog/20060410220525
> 
> 
> > -----Original Message-----
> > From: redhat-list-bounces at redhat.com
> > [mailto:redhat-list-bounces at redhat.com] On Behalf Of Mad Unix
> > Sent: Thursday, May 17, 2007 6:08 AM
> > To: General Red Hat Linux discussion list
> > Subject: mirror
> > 
> > am looking to mirror my internal disk to another disk 
> located on the 
> > machine test at linuxppc:~> df -kh
> > Filesystem            Size  Used Avail Use% Mounted on
> > /dev/sda3             131G  8.4G  116G   7% /
> > /dev/sda2              31M  8.9M   20M  31% /boot
> > none                  930M     0  930M   0% /dev/shm
> > 
> > my dmesg
> > ----//-------------------
> > SCSI subsystem initialized
> > ipr: IBM Power RAID SCSI Device Driver version: 2.0.11.2 
> (January 24, 
> > 2006) ipr 0000:d0:01.0: Found IOA with IRQ: 325 ipr 0000:d0:01.0: 
> > Starting IOA initialization sequence.
> > ipr 0000:d0:01.0: Adapter firmware version: 0510005E ipr
> > 0000:d0:01.0: IOA initialized.
> > scsi0 : IBM 573E Storage Adapter
> >   Vendor: IBM   H0  Model: HUS151414VL3800   Rev: S430
> >   Type:   Direct-Access                      ANSI SCSI revision: 04
> > SCSI device sda: 286748000 512-byte hdwr sectors (146815 MB) SCSI 
> > device sda: drive cache: write through SCSI device sda:
> > 286748000 512-byte hdwr sectors (146815 MB) SCSI device sda: 
> > drive cache: write through
> >  sda: sda1 sda2 sda3 sda4 < sda5 >
> > Attached scsi disk sda at scsi0, channel 1, id 5, lun 0
> >   Vendor: IBM       Model: VSBPD4E2  U4SCSI  Rev: 7217
> >   Type:   Enclosure                          ANSI SCSI revision: 02
> > scsi: unknown device type 31
> >   Vendor: IBM       Model: 573E001           Rev: 0150
> >   Type:   Unknown                            ANSI SCSI revision: 00
> > ----------------------//-----
> > 
> > How would you do the mirror?
> > --
> > madunix
> > --
> > redhat-list mailing list
> > unsubscribe 
> mailto:redhat-list-request at redhat.com?subject=unsubscribe
> > https://www.redhat.com/mailman/listinfo/redhat-list
> > 
> 
> --
> redhat-list mailing list
> unsubscribe mailto:redhat-list-request at redhat.com?subject=unsubscribe
> https://www.redhat.com/mailman/listinfo/redhat-list
>