Is the card hosting any SATA and SAS drives on the same port, or are they segregated SAS on one and SATA on the other?
-J On Wed, Oct 26, 2011 at 9:01 AM, weiliam.hong <weiliam.h...@gmail.com> wrote: > Greetings, > > I have a fresh installation of OI151a: > - SM X8DTH, 12GB RAM, LSI 9211-8i (latest IT-mode firmware) > - pool_A : SG ES.2 Constellation (SAS) > - pool_B : WD RE4 (SATA) > - no settings in /etc/system > > > *zpool status output* > ------------------- > admin@openindiana:~# zpool status > pool: pool_A > state: ONLINE > scan: none requested > config: > > NAME STATE READ WRITE CKSUM > pool_A ONLINE 0 0 0 > mirror-0 ONLINE 0 0 0 > c7t5000C50035062EC1d0 ONLINE 0 0 0 > c8t5000C50034C03759d0 ONLINE 0 0 0 > > pool: pool_B > state: ONLINE > scan: none requested > config: > > NAME STATE READ WRITE CKSUM > pool_B ONLINE 0 0 0 > mirror-0 ONLINE 0 0 0 > c1t50014EE057FCD628d0 ONLINE 0 0 0 > c2t50014EE6ABB89957d0 ONLINE 0 0 0 > > > *Load generation via 2 concurrent dd streams:* > -------------------------------------------------- > dd if=/dev/zero of=/pool_A/bigfile bs=1024k count=1000000 > dd if=/dev/zero of=/pool_B/bigfile bs=1024k count=1000000 > > > *Initial Observation* > ------------------- > > capacity operations bandwidth > pool alloc free read write read write > ---------- ----- ----- ----- ----- ----- ----- > pool_A 1.68G 2.72T 0 652 0 73.4M > mirror 1.68G 2.72T 0 652 0 73.4M > c7t5000C50035062EC1d0 - - 0 619 0 73.4M > c8t5000C50034C03759d0 - - 0 619 0 73.4M > ---------- ----- ----- ----- ----- ----- ----- > pool_B 1.54G 1.81T 0 1.05K 0 123M > mirror 1.54G 1.81T 0 1.05K 0 123M > c1t50014EE057FCD628d0 - - 0 1.02K 0 123M > c2t50014EE6ABB89957d0 - - 0 1.01K 0 123M > > * > 10-15mins later* > ------------=-- > > capacity operations bandwidth > pool alloc free read write read write > ---------- ----- ----- ----- ----- ----- ----- > pool_A 15.5G 2.70T 0 50 0 6.29M > mirror 15.5G 2.70T 0 50 0 6.29M > c7t5000C50035062EC1d0 - - 0 62 0 7.76M > c8t5000C50034C03759d0 - - 0 50 0 6.29M > ---------- ----- ----- ----- ----- ----- ----- > pool_B 28.0G 1.79T 0 1.07K 0 123M > mirror 28.0G 1.79T 0 1.07K 0 123M > c1t50014EE057FCD628d0 - - 0 1.02K 0 123M > c2t50014EE6ABB89957d0 - - 0 1.02K 0 123M > > > > Questions: > 1. Why does SG SAS drives degrade to <10 MB/s while WD RE4 remain consistent > at >100MB/s after 10-15 min? > 2. Why does SG SAS drive show only 70+ MB/s where is the published figures > are > 100MB/s refer here > <http://www.seagate.com/www/en-us/products/enterprise-hard-drives/constellation-es/constellation-es-2/#tTabContentSpecifications>? > 3. All 4 drives are connected to a single HBA, so I assume the mpt_sas > driver is used. Are SAS and SATA drives handled differently ? > > > This is a test server, so any ideas to try and help me understand greatly > appreciated. > > > Many thanks, > WL > > > > > _______________________________________________ > OpenIndiana-discuss mailing list > OpenIndiana-discuss@openindiana.org > http://openindiana.org/mailman/listinfo/openindiana-discuss > _______________________________________________ OpenIndiana-discuss mailing list OpenIndiana-discuss@openindiana.org http://openindiana.org/mailman/listinfo/openindiana-discuss
