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ru.linux
- RU.LINUX ---------------------------------------------------------------------
From : Ivan Kuznetsov 2:5020/400 28 Dec 2007 12:15:14
To : Andrey Slusar
Subject : Re: sil3114 и RAID5
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Hello!
Andrey Slusar пишет:
> Есть чисто спортивный интерес - поднять RAID5 на таком
> "недорейде" на чипсете sil3114. Биос карты поддерживает RAID5 -
> размечает массив без проблем, но ни CentOS5.0-5.1 ни FC7 не захотели
> видет там RAID5. Кто-то пробовал?
По поводу этого чипсета:
http://linuxmafia.com/faq/Hardware/sata.html#sil
#(link) Silicon Image 3112 (2-port integrated chip) / 3114 / 3114R
(4-port integrated chip) and 3512 / 3512A / 3514 (chip in 2-port PCI
card) (Silicon Image, Inc. aka SiI, formerly CMD Technology, Inc.) ---
fakeraid. libata's "sata_sil" driver (production quality) provides
support (a/o 2004-07-08), or probably 2.4.x drivers/ide's siimage driver
(originally developed for the pre-SATA CMD680 aka SiI680 chip used in
many ATA host adapters). Note that enabling libata support for this
chipset requires enabling CONFIG_BROKEN (under "Code maturity level
options") in your kernel configuration, for reasons Garzik has
explained. As of 2004-12, Silicon Image 311x became an open-standard
hardware spec.
An OEM (and apparently slightly modified) version of the SiI 3112 chip
is sometimes integrated into motherboards as the ATI IXP400 SATA chip.
In that form, it's reportedly had support by libata's "sata_sil" driver
since the 2.6.11 kernel.
I am still trying to untangle references to SiI's model numbers. Strings
within Silicon Image's proprietary drivers suggest that that 3112, 3114,
3512, 3514, 434e, and 4e4e are chipset model numbers with the following
"subdevice" numbers in their respective families. 3112: 3423, 6112.
3114: 3424, 6114. 3512: 3422, 3423, 6512. 3514: 3424 (note duplicate),
6514. That driver purports to be for "SiI SATA RAID Controllers 3x and
6x Series" and shows the identification string "SiI6514 (3112 to 6514)
SATA RAID controller".
Daniel Paepcke has posted a HOWTO for building the sata_sil driver.
ataraid support for SiI's Medley fakeraid is available from 2.4.21 or
later's silraid (Arjan van de Ven's) subdriver or its superior 2.4.26
and later replacement, medley (by Thomas Horsten). Note: So far, medley
supports only Medley's RAID0 "striped" mode, and not its RAID1
"mirrored" or RAID1+0 (AKA "RAID10") modes. Alternatively, you can use
Linux's "md" software-RAID driver.
Silicon Image, Inc's proprietary, binary-only drivers are available from
Tyan, Tekram, IBM, or Supermicro.
Adaptec has released a proprietary "aarich" driver (source code wrapper
surrounding a binary-only core library) for Intel ICH5-R and Silicon
Image 3512. (The name is intended to be parsed as AAR-ICH, as it is
intended for Adaptec AAR-series cards based on Intel ICH5 SATA-I chips.)
По поводу fakeraid'ов вообще: в свое время экспериментировал с
несколькими чипсетами, сравнивая производительность с lunux'овым
программным md на тех же самых дисках. md работает не медленнее, а в
ряде случаев - заметно быстрее (до 30%). Вывод: в практическом смысле
игра не стоит свеч
WBR, Ivan Kuznetsov
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