Choosing Serial ATA RAID 5 controller for FBSD 4.9

[Palle Girgensohn]

--On Wednesday, February 25, 2004 15:04:23 -0500 Simon <simon at optinet.com> 
wrote:

>
> Have you tried searching the archives? this was discussed several times.
> 3ware works fine. While you are not explaining what heavy load means,
> you might want to go with SCSI RAID instead. You may not save as much
> as you think with IDE in a long run and get a much better performance if
> you have heavy I/O (heavy use of database).

Simon,

A bit off-topic, what do you mean "may not save as much ... with IDE in a 
long run"?

Is their MTBF worse, or are you just relating to performance?

/Palle


>
> -Simon
>
> On Wed, 25 Feb 2004 13:40:06 +0300, Artem Koutchine wrote:
>
>> We are trying to build a havy load web 2U server using
>> Serial ATA RAID 5 controller. The server will run FreeBSD 4.9
>> and we need a raid card which is supported by 4.9.
>> Another 'must' for the card is that it must be a real hardware
>> RAID 5. Other 'musts' - the card must be LP (low prifile
>> pci card), support PCI 64bit, be real SATA, not just a bridge.
>>
>> Also, it should have nice cache size.
>>
>> For far there are only two candidates:
>> 1) 3Ware 8506-4
>> 2) Adaptec 2410SA
>>
>> IFAIK there are people running FBSD 4.9 on
>> 3Ware 8506-4, however, W3ware 8xxx  card are not listed
>> in the supported hardware for 4.9-RELEASE. Is it just
>> a mistake or it is really not supported or not fully supported?
>> Also, 3Ware 85xx oficially does not have any cache, however,
>> i have found somewhere that it does have it and the cache is 2MB,
>> which is puny. Is it a big deal? Does it really affect perfomance (the
>> card will be running at least 3 drives each with 4-8MB of cache on its
>> own).
>>
>> Adaptec 2410SA seems to be just perfect. Real hardware, 64MB Cache,
>> raid level migration, auto rebuilding and other features. However, i have
>> only
>> some one person running it on 5.2. Can it be run  on 4.9? How stable are
>> the drivers? What is better - stay with 4.9 and 3ware or try using 5.2 in
>> production environment with Adaptec?
>>
>> The server will go in production by the end of april 2004, maybe 5.2
>> will be stable enough by then to run it in production?
>>
>> Any thoughts and comments will be apriciated.
>>
>> Regards,
>> Artem
>>
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