Re: Multi-Actuator SAS HDD First Look

2018-04-18 Thread Tim Walker
On Wed, Apr 18, 2018 at 10:20 AM, Bart Van Assche <bart.vanass...@wdc.com> wrote: > On Wed, 2018-04-18 at 05:16 -0600, Tim Walker wrote: >> It would be good if we could set up an informal meeting time and >> location at LSFMM to discuss these dual actuator topics. so far

Re: Multi-Actuator SAS HDD First Look

2018-04-18 Thread Tim Walker
On Sun, Apr 15, 2018 at 10:31 PM, Bart Van Assche <bart.vanass...@wdc.com> wrote: > On Sun, 2018-04-15 at 19:35 -0600, Tim Walker wrote: >> I also believe the dual-actuator, or any significant HDD parallelism, >> would map well onto an NVMe target, or NVMe-oF behind nvmet. M

Re: Multi-Actuator SAS HDD First Look

2018-04-15 Thread Tim Walker
On Mon, Apr 9, 2018 at 10:02 AM, Douglas Gilbert <dgilb...@interlog.com> wrote: > > On 2018-04-09 02:17 AM, Hannes Reinecke wrote: >> >> On 04/09/2018 04:08 AM, Tim Walker wrote: >>> >>> On Fri, Apr 6, 2018 at 11:09 AM, Douglas Gilbert <dgilb...@interl

Re: Multi-Actuator SAS HDD First Look

2018-04-08 Thread Tim Walker
ou map NVMe's (in Linux) > subsystem number, controller device minor number, CNTLID field > (Identify ctl response) and namespace id onto the SCSI subsystem's > h:c:t:l ? > > Doug Gilbert > Hannes- yes, a drive system altering operation like FORMAT UNIT is asking for a dedic

Re: Multi-Actuator SAS HDD First Look

2018-04-05 Thread Tim Walker
entially or something similar. We are also considering not supporting FORMAT UNIT at all - would anybody object? Any other suggestions? -- Tim Walker Product Design Systems Engineering, Seagate Technology (303) 775-3770

Re: Multi-Actuator SAS HDD First Look

2018-04-02 Thread Tim Walker
On Mon, Apr 2, 2018 at 10:29 AM, Douglas Gilbert <dgilb...@interlog.com> wrote: > On 2018-04-02 11:34 AM, Tim Walker wrote: >> >> On Sat, Mar 31, 2018 at 10:52 AM, Douglas Gilbert <dgilb...@interlog.com> >> wrote: >>> >>> On 2018-03-30 04:01 PM,

Re: Multi-Actuator SAS HDD First Look

2018-04-02 Thread Tim Walker
On Sat, Mar 31, 2018 at 10:52 AM, Douglas Gilbert <dgilb...@interlog.com> wrote: > On 2018-03-30 04:01 PM, Bart Van Assche wrote: >> >> On Fri, 2018-03-30 at 12:36 -0600, Tim Walker wrote: >>> >>> Yes I will be there to discuss the multi-LUN approach. I wa

Re: Multi-Actuator SAS HDD First Look

2018-03-30 Thread Tim Walker
, -Tim On Fri, Mar 30, 2018 at 12:31 PM, Bart Van Assche <bart.vanass...@wdc.com> wrote: > On Fri, 2018-03-30 at 12:21 -0600, Tim Walker wrote: > >> Yes, the header LUN field. Sorry! > >> > >> We hadn't intended to broadcast - we expect to see a LUN specified. >

Re: Multi-Actuator SAS HDD First Look

2018-03-30 Thread Tim Walker
will also be stopped. Sorry if my terminology wasn't entirely clear - some jargon and informal usage slipping through. Best regards, -Tim -Tim On Fri, Mar 30, 2018 at 12:17 PM, Bart Van Assche <bart.vanass...@wdc.com> wrote: > On Fri, 2018-03-30 at 12:07 -0600, Tim Walker wrote: >> Co

Re: Multi-Actuator SAS HDD First Look

2018-03-30 Thread Tim Walker
cified in the command is returned. 0x1D: SEND DIAGNOSTIC. Device/ LUN. The device will perform the diagnostic operations (self-test) on both the LUNs. The 'translate address' operation is performed on the LUN specified. Best regards, -Tim (303) 775-3770 On Fri, Mar 30, 2018 at 7:07 AM, Tim Walker <

Re: Multi-Actuator SAS HDD First Look

2018-03-30 Thread Tim Walker
question. Best regards, -Tim On Thu, Mar 29, 2018 at 12:03 PM, Douglas Gilbert <dgilb...@interlog.com> wrote: > On 2018-03-26 11:08 AM, Hannes Reinecke wrote: >> >> On Fri, 23 Mar 2018 08:57:12 -0600 >> Tim Walker <tim.t.wal...@seagate.com> wrote: >> >>>

Multi-Actuator SAS HDD First Look

2018-03-23 Thread Tim Walker
t MQ architecture 2. Linux changes needed 3. Drive interface changes needed 4. Anything else I may have overlooked Please feel free to send any questions or comments. Tim Walker Product Design Systems Engineering, Seagate Technology (303) 775-3770