the up/down/up/down/... scenario should give the best results in minimizing accumulative rotation vibration.
-=dave ----- Original Message ----- From: <[EMAIL PROTECTED]> To: "Dave Johnson" <[EMAIL PROTECTED]> Cc: "Christopher Gibbs" <[EMAIL PROTECTED]>; <zfs-discuss@opensolaris.org> Sent: Friday, September 07, 2007 2:35 AM Subject: Re: [zfs-discuss] New zfs pr0n server :))) > > I've seen the page with the pics of that server, and I agree with this > issue > So I'd like to try to reverse half of the disks too, how would you advice > to do this? > My current setup is as follows, where up is normal disk upside paced, and > down is with upside plate down and electronics side up: > up > up > up > up > up > up > up > up > > would it be better to do this: > up > down > up > down > up > down > up > down > > or this: > up > up > up > up > down > down > down > down > > or maybe this? > up > up > down > down > up > up > down > down > > > > > > On Thu, Sep 06, 2007 at 03:24:25PM -0700, Dave Johnson wrote: >> Agreed ! >> >> However, you may be able to lower the sound ever so slightly more by >> staggering the drives so that every other one is upside down, spinning >> the >> opposite direction and thus minimizing accumulative rotational vibration. >> >> I had to make a makeshift temporary server when our NAS gateway device >> had >> a problem that required we reinitialize the array (after moving all data >> off of course). I used a Coolermaster CM Stacker with 16x750GB drives in >> SATA 4-drive carriers all going the same direction and the system made a >> horrendous oscillating buzz, as well as the occasional drive timeout >> warning from the RAID controller when the system was under high load (all >> drives part of single RAID6 array). >> >> After some thought, I decided to turn 2 of the 4 drive cages upside down >> so >> that the config had 4 drives spinning normally, 4 upside down, 4 >> normally, >> and finally another 4 upside down. The oscillation was gone completely >> as >> were the rare drive timeouts under load. >> >> Your laced setup places the drives in so much dampening that it might not >> make much of a difference but still, might as well take care of it now >> rather than later when it's all buttoned up if it starts buzz. It >> certainly couldn't hurt. >> >> -=dave >> >> ----- Original Message ----- >> From: "Christopher Gibbs" <[EMAIL PROTECTED]> >> To: "Diego Righi" <[EMAIL PROTECTED]> >> Cc: <zfs-discuss@opensolaris.org> >> Sent: Thursday, September 06, 2007 8:06 AM >> Subject: Re: [zfs-discuss] New zfs pr0n server :))) >> >> >> >Wow, what a creative idea. And I'll bet that allows for much more >> >airflow than the 4-in-3 drive cages do. Very nice. >> > >> >On 9/6/07, Diego Righi <[EMAIL PROTECTED]> wrote: >> >>Unfortunately it only comes with 4 adapters, bare metal adapters >> >>without >> >>any dampering /silencing and so on... >> >>...anyway I wanted to make it the most silent I could, so I suspeded >> >>all >> >>the 10 disks (8 sata 320gb and a little 2,5" pata root disk) with a >> >>flexible wire, like I posted in this italian forum, the page is in >> >>italian, but the pictures show the concept well enough: >> >>http://www.pcsilenzioso.it/forum/showthread.php?t=2397 >> >> >> >> >> >>This message posted from opensolaris.org >> >>_______________________________________________ >> >>zfs-discuss mailing list >> >>zfs-discuss@opensolaris.org >> >>http://mail.opensolaris.org/mailman/listinfo/zfs-discuss >> >> >> > >> > >> >-- >> >Christopher Gibbs >> >Email / LDAP Administrator >> >Web Integration & Programming >> >Abilene Christian University >> >_______________________________________________ >> >zfs-discuss mailing list >> >zfs-discuss@opensolaris.org >> >http://mail.opensolaris.org/mailman/listinfo/zfs-discuss >> > >> > _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
