# [OmniOS-discuss] Ang: Ang: Ang: Re: LU read only and r/w for different hosts?

Johan Kragsterman johan.kragsterman at capvert.se
Fri Jan 2 17:52:46 UTC 2015

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    Hmmm again....a lot of hmmm's here today...

    Been reading some more, and it looks like it is possible to reserve at LU level. I found a guy that uses an sg-persist command on solaris 11.1, but I don't find it in OmniOS. I did a pkg search, but perhaps I don't know what to search for...?

    -----"OmniOS-discuss" <omnios-discuss-bounces at lists.omniti.com> skrev: -----
    Till: Richard Elling <richard.elling at richardelling.com>
    Från: Johan Kragsterman
    Sänt av: "OmniOS-discuss"
    Datum: 2015-01-02 17:53
    Kopia: "omnios-discuss at lists.omniti.com" <omnios-discuss at lists.omniti.com>
    Ärende: [OmniOS-discuss] Ang: Ang: Re: LU read only and r/w for different	hosts?

    -----"OmniOS-discuss" <omnios-discuss-bounces at lists.omniti.com> skrev: -----
    Till: Richard Elling <richard.elling at richardelling.com>
    Från: Johan Kragsterman
    Sänt av: "OmniOS-discuss"
    Datum: 2015-01-02 17:38
    Kopia: "omnios-discuss at lists.omniti.com" <omnios-discuss at lists.omniti.com>
    Ärende: [OmniOS-discuss] Ang: Re: LU read only and r/w for different hosts?

    -----Richard Elling <richard.elling at richardelling.com> skrev: -----
    Till: Johan Kragsterman <johan.kragsterman at capvert.se>
    Från: Richard Elling <richard.elling at richardelling.com>
    Datum: 2015-01-02 16:03
    Kopia: "omnios-discuss at lists.omniti.com" <omnios-discuss at lists.omniti.com>
    Ärende: Re: [OmniOS-discuss] LU read only and r/w for different hosts?

    It has been a while since using comstar, but the SCSI protocol has
    WERO group reservations. Would that suffice?

     -- richard

    Yeah, I believe so....question is how I can manage it? It doesn't seem to be a part of stmfadm, so I need to do it elsewhere, if possible...so you, or someone else, got some ideas...?

    Rgrds Johan

    Hmm, been reading up a little on the PR and WERO....it seems to be registering on DEVICE level, not on LU level, huh? Or do I misinterpret something here...?

    > On Jan 2, 2015, at 12:18 AM, Johan Kragsterman <johan.kragsterman at capvert.se> wrote:
    >
    > Hi!
    >
    >
    > I've been thinking about this for a while, and haven't figured out a solution.
    >
    > I'd like to have a possibility to set LU read only for some hosts, but r/w to others, for the same LU. There are possibilities to set read only, or r/w, on a LU, but that property is valid for all hosts, it is not(afaik) possible to choose which hosts are going to get read only, and which are going to get r/w.
    >
    > This is an access controll operation, and as such, imho, should be controlled by comstar. It is the responsability of the view to handle this, but I haven't seen this anywhere in the comstar/stmf configuration posibilities.
    >
    > Are there someone on this list that can shed some light on this?
    >
    >
    > Best regards from/Med vänliga hälsningar från
    >
    > Johan Kragsterman
    >
    > Capvert
    >
    > _______________________________________________
    > OmniOS-discuss mailing list
    > OmniOS-discuss at lists.omniti.com
    > http://lists.omniti.com/mailman/listinfo/omnios-discuss

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