topic Re: Write and Verify feature in Disk

Write and Verify feature

Mike9836 — Wed, 20 Mar 2013 13:58:37 GMT

Hi.

Is the Write and Verify feature enabled by default on HP SAS drives and if not, how does the drive check that it wrote data correctly?

Thanks for your time.

Re: Write and Verify feature

AnkitM — Wed, 20 Mar 2013 18:07:38 GMT

I was unable to find such thing as a feature for HP SAS Drives. However, I am intrigue to know how does it happen if its done on a hardware level. As far as my understanding goes, IOPS are written to the disks and Ack is sent to the Server as a part of Syn - Ack.

I read through below links but couldn't find anything related to this query though:

http://h18004.www1.hp.com/products/servers/proliantstorage/serial/sas/index.html

http://h18004.www1.hp.com/products/quickspecs/12244_div/12244_div.html

Re: Write and Verify feature

Mark Matthews — Wed, 10 Apr 2013 11:43:03 GMT

All LTO (Ultrium) based tape drives have a Verify-as-they-write feature meaning that you no longer have to run the verify option on your backup jobs, but I've never heard of the same thing with HDDs...

Re: Write and Verify feature

PAC-MAN — Wed, 10 Apr 2013 20:48:24 GMT

Me neither!