Tomas Ögren wrote:
> On 27 September, 2008 - Brandon High sent me these 1,0K bytes:
>
>   
>> On Sat, Sep 27, 2008 at 4:02 PM, Marcus Sundman <[EMAIL PROTECTED]> wrote:
>>     
>>> So, is it possible to create a 5 * 1 TB raidz with 4 disks (i.e., with
>>> one disk offline)? In that case I could use one of the 1 TB disks as
>>>       
>> The official answer is no, but it might be possible to fool Solaris
>> into letting you do it. I haven't tired this, so I don't know if it'll
>> work.
>>
>> 1. Create a sparse file on an existing filesystem. The size should be
>> the same as your disks.
>> 2. Create the raidz with 4 of the drives and the sparse file.
>> 3. Export the zpool.
>> 4. Delete the sparse file
>> 5. Import the zpool. It should come up as degraded, since one of its
>> vdevs is missing.
>> 6. Copy your files onto the zpool.
>> 7. replace the file vdev with the 5th disk.
>>
>> Like I said, I haven't tried this but it might work. I'd love to hear
>> if it does.
>>     
>
> I just tried (mkfile in /tmp) on both Sol10u5 and snv97, both seems to
> work.
>   

Or use a ramdisk.  See ramdiskadm(1m)
[most people don't seem to know Solaris has ramdisk devices]
 -- richard

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