[OmniOS-discuss] Writeback Cache Auto disabled

[Richard Elling]

> On May 6, 2015, at 12:49 AM, dwq at xmweixun.com wrote:
> 
> Hi Richard
>          I use stmfadm modify-lu –p wcd=false LU Name, change write cache to enable,but when client read  or wirte io  from lu,lu status (writeback cache) change to disable again.

This is correct. Initiators can override the target's default.
 -- richard

>  
>  
>  
> Best Regards,
> Deng Wei Quan / 邓伟权
> Mob: +86 13906055059
> Mail: dwq at xmweixun.com <mailto:dwq at xmweixun.com>
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> 发件人: dwq+auto_=dengweiquan=139.com at xmweixun.com [mailto:dwq+auto_=dengweiquan=139.com at xmweixun.com] 代表 Richard Elling
> 发送时间: 2015年5月5日 23:17
> 收件人: dwq at xmweixun.com
> 抄送: omnios-discuss at lists.omniti.com
> 主题: Re: [OmniOS-discuss] Writeback Cache Auto disabled
>  
>  
>> On May 5, 2015, at 12:54 AM, <dwq at xmweixun.com <mailto:dwq at xmweixun.com>> <dwq at xmweixun.com <mailto:dwq at xmweixun.com>> wrote:
>>  
>> Hi All,
>>          When I present lu to hpux or aix, lu writeback cache auto disabled,why?
>  
> In SCSI, initiators can change the write cache policy.
>  — richard
> 
> 
>>  
>> LU Name: 600144F00000000000005548DC360005
>>     Operational Status: Online
>>     Provider Name     : sbd
>>     Alias             : /dev/zvol/rdsk/wxnas/hpuxtest03
>>     View Entry Count  : 1
>>     Data File         : /dev/zvol/rdsk/wxnas/hpuxtest03
>>     Meta File         : not set
>>     Size              : 21474836480
>>     Block Size        : 512
>>     Management URL    : not set
>>     Vendor ID         : SUN     
>>     Product ID        : COMSTAR         
>>     Serial Num        : not set
>>     Write Protect     : Disabled
>>     Writeback Cache   : Disabled
>> Access State      : Active
>>  
>>  
>> Thanks.
>>  
>> Version:
>> SunOS wxos1 5.11 omnios-b281e50 i86pc i386 i86pc
>> Deng
>>  
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>  
> --
>  
> Richard.Elling at RichardElling.com <mailto:Richard.Elling at RichardElling.com>
> +1-760-896-4422
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