> You'll get a device not ready on the secondary/ghost path if you have > MPxIO enabled on the array. Just to be awkward, one of our arrays (cab2a01) has mpxio (sun speakexplicit) just now, the other (cab5a01) has rw (sun speak implicit failover) > Nothing included with the standard kernel and multipath-tools will > work if you have the 6320 array set in MPxIO mode. You'll either > have to set the array into 'rw' mode, which I would not recommend if > you are sharing LUNs between hosts, or you can try the patches > for the kernel and multipath-tools that I've been working on. as this array is only used by 2 linux clients, I'm prepared to give it a test... > I've attached the patches. Ta. > > The first patch is to add a hardware handler to the kernel so it ... OK - bearing in mind I'm using the RHEL (actually centos version) I'm still running on 2.6.9-34.107.plus.c4smp > The kernel patch requires the bio-sense-data.patch be applied first. > I would also recommend applying the dm-mpath-hw-handler-sense-data > patch also. Hmm. Stupid Q - are these somewhere in the git tree? if so a pointer please. > The second patch is to the multipath-tools to add priority checker > to make sure device-mapper uses the primary path if that is available. > It also adds an entry to the hardware table so that it defaults are > set correctly for a Sun T3/T4 array. There is also a path checker > included, but readsector0 might also work too. > This part was much more sucessful: well, apart from compiling up the 0.4.7 drivers over the device-mapper-multipath-0.4.5-12.0.RHEL4 RPM and possibly confusing LVM2.. [root@bgldisk2 ~]# multipath -v2 -d 0:0:0:0: sg_io failed status 0x8 0x0 0x0 0x4 0:0:0:0: Unable to get INQUIRY vpd 1 page 0x0. error calling out /sbin/scsi_id -g -u -s /block/sda create: mpath0 (0ATA_____Maxtor_6Y080M0__Linux_ATA-SCSI_simulator) [size=74 GB][features=0][hwhandler=0] \_ round-robin 0 [prio=1][undef] \_ 1:0:0:0 sdb 8:16 [undef][ready] create: cab2a01t0 (360003baccb976000426f26d30004c45a) [size=1638 GB][features=0][hwhandler=1 sun_tx] \_ round-robin 0 [prio=50][undef] \_ 4:0:0:0 sdh 8:112 [undef][ready] \_ round-robin 0 [prio=1][undef] \_ 3:0:0:0 sdc 8:32 [undef][ghost] create: cab2a01t1 (360003baccb976000426f27a00006ae93) [size=1638 GB][features=0][hwhandler=1 sun_tx] \_ round-robin 0 [prio=50][undef] \_ 4:0:0:1 sdi 8:128 [undef][ready] \_ round-robin 0 [prio=1][undef] \_ 3:0:0:1 sdd 8:48 [undef][ghost] create: cab2a01t2 (360003baccb976000426f289000049adb) [size=1638 GB][features=0][hwhandler=1 sun_tx] \_ round-robin 0 [prio=50][undef] \_ 3:0:0:2 sde 8:64 [undef][ready] \_ round-robin 0 [prio=1][undef] \_ 4:0:0:2 sdj 8:144 [undef][ghost] create: cab5a01t0 (360003baccbbb3000426571c00005d3ad) [size=1638 GB][features=0][hwhandler=1 sun_tx] \_ round-robin 0 [prio=50][undef] \_ 4:0:1:0 sdk 8:160 [undef][ready] \_ round-robin 0 [prio=1][undef] \_ 3:0:1:0 sdf 8:80 [undef][ghost] create: cab5a01t1 (360003baccbbb30004318746a000d7607) [size=1638 GB][features=0][hwhandler=1 sun_tx] \_ round-robin 0 [prio=50][undef] \_ 4:0:1:1 sdl 8:176 [undef][ready] \_ round-robin 0 [prio=1][undef] \_ 3:0:1:1 sdg 8:96 [undef][ghost] create: cab2a01t0 (360003baccb976000426f26d30004c45a) [size=1638 GB][features=0][hwhandler=1 sun_tx] \_ round-robin 0 [prio=50][undef] \_ 4:0:0:0 sdh 8:112 [undef][ready] \_ round-robin 0 [prio=1][undef] \_ 3:0:0:0 sdc 8:32 [undef][ghost] create: cab2a01t1 (360003baccb976000426f27a00006ae93) [size=1638 GB][features=0][hwhandler=1 sun_tx] \_ round-robin 0 [prio=50][undef] \_ 4:0:0:1 sdi 8:128 [undef][ready] \_ round-robin 0 [prio=1][undef] \_ 3:0:0:1 sdd 8:48 [undef][ghost] create: cab2a01t2 (360003baccb976000426f289000049adb) [size=1638 GB][features=0][hwhandler=1 sun_tx] \_ round-robin 0 [prio=50][undef] \_ 3:0:0:2 sde 8:64 [undef][ready] \_ round-robin 0 [prio=1][undef] \_ 4:0:0:2 sdj 8:144 [undef][ghost] create: cab5a01t0 (360003baccbbb3000426571c00005d3ad) [size=1638 GB][features=0][hwhandler=1 sun_tx] \_ round-robin 0 [prio=50][undef] \_ 4:0:1:0 sdk 8:160 [undef][ready] \_ round-robin 0 [prio=1][undef] \_ 3:0:1:0 sdf 8:80 [undef][ghost] create: cab5a01t1 (360003baccbbb30004318746a000d7607) [size=1638 GB][features=0][hwhandler=1 sun_tx] \_ round-robin 0 [prio=50][undef] \_ 4:0:1:1 sdl 8:176 [undef][ready] \_ round-robin 0 [prio=1][undef] \_ 3:0:1:1 sdg 8:96 [undef][ghost] looks great! however... doesn't seem to set up the paths correctly -v3 shows me (snipped to show single tray) 8:96 ownership set to cab5a01t1 sdg: not found in pathvec sdg: mask = 0xc sdg: path checker = sun_tx (controler setting) sdg: state = 4 sdg: getprio = /sbin/mpath_prio_sun_tx /dev/%n (controler setting) sdg: prio = 1 8:176 ownership set to cab5a01t1 sdl: not found in pathvec sdl: mask = 0xc sdl: path checker = sun_tx (controler setting) sdl: state = 2 sdl: getprio = /sbin/mpath_prio_sun_tx /dev/%n (controler setting) sdl: prio = 50 cab5a01t1: pgfailover = -1 (internal default) cab5a01t1: pgpolicy = group_by_prio (controler setting) cab5a01t1: selector = round-robin 0 (controler setting) cab5a01t1: features = 0 (controler setting) cab5a01t1: hwhandler = 1 sun_tx (controler setting) cab5a01t1: rr_weight = 1 (controler setting) cab5a01t1: minio = 1000 (controler setting) cab5a01t1: no_path_retry = NONE (internal default) cab5a01t1: set ACT_CREATE (map does not exist) cab5a01t1: set ACT_CREATE (map does not exist) cab5a01t1: domap (0) failure for create/reload map it's that "domap (0) failure for create/reload map" that looks bad... Have I missed something ? Andrew -- dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
