[OpenIndiana-discuss] iSCSI volume and ZFS

[Christopher Chan]

On Wednesday, July 24, 2013 03:18 AM, CJ Keist wrote:
> Yes, that would be the case. I'm looking at EMC iSCSI storage unit. So 
> it's pretty much the same case that I have with our current OI system 
> using Raid controller to present one single volume to create a ZFS 
> file system on correct? There is the potential of loosing the entire 
> ZFS file system if anything got corrupted during data transfers.
>

Did you know that one of the points of using ZFS is to do away with 
hardware raid? Especially for raid5,6 and so on. raidz solves the 
write-hole problem that raid5,6 has.

ZFS is used as an iscsi target. Not sure why you want to go the other 
way round. ZFS does not support clustering nor does it have special 
features beyond disk and data management. Why do you have this idea of 
running ZFS over iscsi?

>
>
>
> On 7/23/13 12:05 PM, alka wrote:
>> Understanding correctly:
>>
>> You are trying to buy a iSCSI array ex like a Dell 3200, 
>> http://www.dell.com/us/business/p/powervault-iscsi-arrays or similar
>> with a hardware raid + oldstyle unsecure filesystem on it and share 
>> this volume via iSCSI as a single disk vdev to OI and format with ZFS??
>>
>> This is a absolute nogo !
>> While this will work it is slower than using OI only for all SAN or 
>> NAS tasks. Main problem is that you have checksum validation
>> but without any  error repair options. For these a ZFS software raid 
>> with redundancy is needed.
>>
>> Better look at a SuperMicro Jbod case with a SuperMicro X9..-F 
>> mainboard, enough LSI 9207 HBA for all disks and you can do all what 
>> you want.
>> If you need iSCSI on it, read about Comstar, the iSCSI target 
>> solution on Solarish systems
>>
>>
>>
>> Am 23.07.2013 um 18:42 schrieb CJ Keist:
>>
>>> I'm looking at purchasing a iSCSI disk raid array and using OI to 
>>> mount the iSCSI volume and format with ZFS.  Anyone out there doing 
>>> this? I'd be interested in successes or issues that I should look 
>>> out for.
>>>
>>> Thanks....
>>>
>>> -- 
>>> C. J. Keist                     Email: cj.keist at colostate.edu
>>> Systems Group Manager           Solaris 10 OS (SAI)
>>> Engineering Network Services    Phone: 970-491-0630
>>> College of Engineering, CSU     Fax:   970-491-5569
>>> Ft. Collins, CO 80523-1301
>>>
>>> All I want is a chance to prove 'Money can't buy happiness'
>>>
>>> _______________________________________________
>>> OpenIndiana-discuss mailing list
>>> OpenIndiana-discuss at openindiana.org
>>> http://openindiana.org/mailman/listinfo/openindiana-discuss
>>
>> -- 
>>
>>
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>