[mythtv-users] NAS RAID 5 for MythTv

[Jarod Wilson]

Steven Adeff wrote:
> On 2/8/07, Robert Kulagowski <bob at smalltime.com> wrote:
>>> I would recommend taking a very good look at the 9550 though - the specs
>>> are significantly better than the 9500, not sure how price compares
>>> though.
>> That may be true, but for the price (I also paid about $300 a year ago
>> on e-bay), the performance is more than what I need.
> 
> anyone know anything about the  3ware Escalade 8506-8 cards?

3ware in general is just plain Good Stuff, in my experience. I've got a 
9500s-8 myself, hooked to 8 250G SATA drives. More than enough 
performance, and like Bob, got it off eBay (for $230, iirc).

The 8000-series lacks some of the management features of the 
9000-series, and may be slightly slower, but it'd sill be a perfectly 
good card for a MythTV storage array. Here's some help output from 
3ware's cli utils that may be enlightening:


//apollo> /c0 help

   /cx show
   /cx show Attribute [Attribute ...]           where Attribute is:
     achip|allunitstatus|autocarve(9000 series)|autorebuild(9550SX only)
     bios|carvesize(9000 series)|driver|drivestatus|exportjbod
     firmware|memory|model|monitor|numdrives|numports|numunits
     ctlbus(9550SX only)|ondegrade(9000S only)|pcb|pchip|serial
     spinup|stagger|unitstatus

   /cx show all         where all means Attributes and configurations.
   /cx show diag
   /cx show alarms [reverse]
   /cx show rebuild                                      (9000 series)
   /cx show verify                                       (9000 series)
   /cx show selftest                                     (9000 series)

   /cx add type=<RaidType> disk=<p:-p..> [stripe=<Stripe>] [noscan]
     [nocache] [group=<3|4|5|6|7|8>] [autoverify] [ignoreECC]
     [name=string (9000 series)] [storsave=<protect|balance|perform>
     (9550SX only)] RaidType = { raid0, raid1, raid5, raid10, raid50,
     single, spare, JBOD (7000/8000 only)}

   /cx add rebuild=ddd:hh:duration                       (9000 series)
   /cx add verify=ddd:hh:duration                        (9000 series)
   /cx add selftest=ddd:hh                               (9000 series)

   /cx del rebuild=slot_id                               (9000 series)
   /cx del verify=slot_id                                (9000 series)
   /cx del selftest=slot_id                              (9000 series)

   /cx set exportjbod=on|off                             (9000 series)
   /cx set ondegrade=cacheoff|follow                     (9000S only)
   /cx set spinup=nn                                     (9000 series)
   /cx set stagger=nn                                    (9000 series)
   /cx set autocarve=on|off                              (9000 series)
   /cx set carvesize=[1024..2048]                        (9000 series)
   /cx set rebuild=enable|disable|<1..5> (enable|disable for 9000 series)
   /cx set verify=enable|disable|<1..5>  (enable|disable for 9000 series)
   /cx set selftest=enable|disable [task=UDMA|SMART]     (9000 series)
   /cx set autorebuild=on|off                            (9550SX only)

   /cx flush
   /cx commit                    (Windows only) (Also known as shutdown)
   /cx start mediascan                                  (7000/8000 only)
   /cx stop mediascan                                   (7000/8000 only)
   /cx rescan [noscan] NOTE: Does not import non-JBOD on 7000/8000 models.

-- 
Jarod Wilson
jarod at wilsonet.com