From: Konstantin Lepikhov <lakostis@mmti.ru>
To: community@altlinux.ru
Subject: [Comm] Re: скорость raid 5
Date: Mon, 29 Sep 2003 21:00:10 +0400
Message-ID: <20030929170010.GB4973@lks.home> (raw)
In-Reply-To: <447676348.20030929115343@kreschatic.kiev.ua>
Hi Alexey!
Monday 29, at 11:53:43 AM you wrote:
> Hello community,
>
> Есть железяка, gateway 8200 с контролером aic7890 и ami megaraid. 4
> диска segate cheetah в raid 5. Как я понимаю непрерывный трансфер
> должен быть порядка 40-50Мb/s. Хотя hdparm дает следующее:
> #hdparm -tT /dev/sda
>
> /dev/sda:
> Timing buffer-cache reads: 492 MB in 2.00 seconds = 246.00 MB/sec
> Timing buffered disk reads: 26 MB in 3.16 seconds = 8.23 MB/sec
>
> Помогите разобраться с этой проблемой, или наставте на путь истинный.
> P.S. Кусок dmesg в атаче.
irq conflict? Плохая терминация? Какой размер кеша на megaraid?
например, с MegaRAID Elite 1600 след. картина:
root@cedar ~# hdparm -tT /dev/sda
/dev/sda:
Timing buffer-cache reads: 864 MB in 2.00 seconds = 432.00 MB/sec
Timing buffered disk reads: 186 MB in 3.01 seconds = 61.79 MB/sec
root@cedar ~#
root@cedar ~# cat /proc/megaraid/0/config
MegaRAID Elite 1600
Controller Type: 438/466/467/471/493
Controller Supports 40 Logical Drives
Controller / Driver uses 64 bit memory addressing
Base = f8825000, Irq = 21, Logical Drives = 1, Channels = 2
Version =G170:F316, DRAM = 128Mb
Controller Queue Depth = 254, Driver Queue Depth = 126
правда у меня raid10
--
WBR, Konstantin chat with ==>ICQ: 109916175
Lepikhov, speak to ==>JID: lakostis@jabber.org
aka L.A. Kostis write to ==>mailto:lakostis@pisem.net.nospam
...The information is like the bank... (c) EC8OR
next prev parent reply other threads:[~2003-09-29 17:00 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-09-29 8:53 [Comm] " Alexey Berezkin
2003-09-29 17:00 ` Konstantin Lepikhov [this message]
2003-09-30 7:21 ` [Comm] " Alexey Berezkin
2003-09-30 19:03 ` Konstantin Lepikhov
2003-10-01 8:50 ` Alexey Berezkin
2003-10-02 19:04 ` Konstantin Lepikhov
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