[DRBD-user] The ServerForDLess message and what might cause the kernel to disable the RAID card?

Lars Ellenberg Lars.Ellenberg at linbit.com
Thu Feb 23 17:27:34 CET 2006

Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.


/ 2006-02-23 02:22:08 -0500
\ Maurice Volaski:
> (Thanks for your answers to my recent queries.)
> 
> I'm working with a situation where the computer that is ordinarily primary is acting weird.
> 
> This computer is an IBM Netfinity with a ServeRAID 4Lx card serving
> all the hard drives. There are two RAID sets. Root is a RAID 1 pair
> and the data are a RAID 5 pair. All the drbd volumes run directly on
> the RAID 5 pair. (There is no LVM involved.)
> 
> Server comes up and drbd sees a full sync is needed. The sync appears
> to run to completion and then the IRQ handling the ServeRAID is
> disabled. No disk is accessible and the computer is essentially
> crashed.
> 
> The currently acting primary says in /proc/drbd:
> 
> 0: cs:ServerForDLess st:Primary/Secondary ld:Consistent
> 
> This doesn't make sense to me because this computer is the primary and
> the secondary is the one that diskless. How can the primary ever be a
> server for anything other than itself?

/proc/drbd reports "ServerForDLess" if we are connected, we have a disk
ourselves, but the we know the peer is diskless. regardless of "primary"
or "secondary".
so what.

maybe we change this, but this is cosmetics only.

> I have tried this with the crashing computer running 0.7.14 and kernel
> 2.6.15 and again with 0.7.16 and kernel 2.6.16-rc4.
> 
> I have also swapped out the RAID card and moved it to a different PCI
> slot. The computer has two other PCI cards, both Ethernet cards.
> Onboard SCSI and Ethernet are BIOS-disabled.
> 
> Does anyone have any ideas about what might trigger the kernel to
> disable the IRQ associated with the RAID card?

not at all, sorry.

-- 
: Lars Ellenberg                                  Tel +43-1-8178292-0  :
: LINBIT Information Technologies GmbH            Fax +43-1-8178292-82 :
: Schoenbrunner Str. 244, A-1120 Vienna/Europe   http://www.linbit.com :
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