Date: Mon, 24 Apr 2000 22:56:29 +0200 From: sthaug@nethelp.no To: mjacob@feral.com Cc: ken@kdm.org, freebsd-scsi@FreeBSD.ORG Subject: Re: Safe mounting of one file system on multiple hosts? Message-ID: <75152.956609789@verdi.nethelp.no> In-Reply-To: Your message of "Mon, 24 Apr 2000 13:48:22 -0700 (PDT)" References: <Pine.BSF.4.05.10004241348160.87772-100000@semuta.feral.com>
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> Define 'problems'. Like this: (da4:ahc2:0:0:2): SCB 0x0 - timed out while idle, LASTPHASE == 0x1, SEQADDR == 0xa (da4:ahc2:0:0:2): Queuing a BDR SCB (da4:ahc2:0:0:2): Bus Device Reset Message Sent (da4:ahc2:0:0:2): no longer in timeout, status = 34b ahc2: Bus Device Reset on A:0. 10 SCBs aborted (da4:ahc2:0:0:2): SCB 0x2b - timed out while idle, LASTPHASE == 0x1, SEQADDR == 0x8 (da4:ahc2:0:0:2): Queuing a BDR SCB (da4:ahc2:0:0:2): Bus Device Reset Message Sent (da4:ahc2:0:0:2): no longer in timeout, status = 34b ahc2: Bus Device Reset on A:0. 26 SCBs aborted (da4:ahc2:0:0:2): SCB 0x19 - timed out in datain phase, SEQADDR == 0x5e (da4:ahc2:0:0:2): Other SCB Timeout (da4:ahc2:0:0:2): SCB 0x17 - timed out in datain phase, SEQADDR == 0x5e (da4:ahc2:0:0:2): Other SCB Timeout Unexpected busfree. LASTPHASE == 0x40 SEQADDR == 0x5e ahc2:A:0: no active SCB for reconnecting target - issuing BUS DEVICE RESET SAVED_TCL == 0x1, ARG_1 == 0x15, SEQ_FLAGS == 0x0 ahc2: Bus Device Reset on A:0. 14 SCBs aborted As I mentioned, if I turn off tagged queuing on the host channel with the two LUNs, everything seems to work just fine - but somewhat slower for certain operations, of course. Steinar Haug, Nethelp consulting, sthaug@nethelp.no > > On Mon, 24 Apr 2000 sthaug@nethelp.no wrote: > > > > I would recommend that you test out the controller carefully under high > > > load conditions if you have more than one array configured on it. > > > > > > There have been a number of reports (see the list archives) about problems > > > with CMD RAID arrays with more than one LUN (i.e. more than one array) > > > configured. > > > > I have two LUNs on one of the host channels, and I can easily provoke > > problems here (running a few copies of bonnie, for instance) with > > tagged queueing enabled. If I turn off tagged queueing on the host > > channel with multiple LUNs (as suggested by Oliver Blasnik > > <ob@omnilink.net>), there are no problems. > > > > Steinar Haug, Nethelp consulting, sthaug@nethelp.no > > > > > > To Unsubscribe: send mail to majordomo@FreeBSD.org > > with "unsubscribe freebsd-scsi" in the body of the message > > > To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-scsi" in the body of the message
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