我的linux服务器需要一个多小时才能启动.建议？

我正在构建一个CentOS 5.4系统,该系统使用模拟IDE驱动器的读卡器启动紧凑型闪存卡.它真的需要一个小时才能启动.当Grub加载内核时会发生超慢速部分.完成后,其余的启动过程只需大约一分钟即可到达登录提示.有没有人有什么建议？

我怀疑它可能与UDMA有关.我的BIOS中与IDE相关的所有内容似乎都要结帐.读取性能hdparm告诉我1.77 MB / s.哎哟! (但即使按照这个速度,它仍然不需要一个小时来解压缩并加载内核)

[root@server ~]# hdparm -tT /dev/hdc

/dev/hdc:
 Timing cached reads:   2444 MB in  2.00 seconds = 1222.04 MB/sec
 Timing buffered disk reads:    6 MB in  3.39 seconds =   1.77 MB/sec

尝试启用DMA是不可取的：

[root@server ~]# hdparm -d1 /dev/hdc

/dev/hdc:
 setting using_dma to 1 (on)
 HDIO_SET_DMA failed: Operation not permitted
 using_dma    =  0 (off)

以下是一些可能有用的命令输出：

系统

[root@server ~]# uname -a
Linux server.localdomain 2.6.18-164.el5xen #1 SMP Thu Sep 3 04:47:32 EDT 2009 i686 i686 i386 GNU/Linux

PCI信息：

[root@server ~]# lspci -v
00:00.0 Host bridge: Intel Corporation 82945G/GZ/P/PL Memory Controller Hub (rev 02)
        Subsystem: Intel Corporation 82945G/GZ/P/PL Memory Controller Hub
        Flags: bus master,fast devsel,latency 0
        Capabilities: [e0] Vendor Specific Information

00:02.0 VGA compatible controller: Intel Corporation 82945G/GZ Integrated Graphics Controller (rev 02) (prog-if 00 [VGA controller])
        Subsystem: Intel Corporation 82945G/GZ Integrated Graphics Controller
        Flags: bus master,latency 0,IRQ 10
        Memory at fdf00000 (32-bit,non-prefetchable) [size=512K]
        I/O ports at ff00 [size=8]
        Memory at d0000000 (32-bit,prefetchable) [size=256M]
        Memory at fdf80000 (32-bit,non-prefetchable) [size=256K]
        Capabilities: [90] Message Signalled Interrupts: 64bit- Queue=0/0 Enable-
        Capabilities: [d0] Power Management version 2

00:1d.0 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI Controller #1 (rev 01) (prog-if 00 [UHCI])
        Subsystem: Intel Corporation 82801G (ICH7 Family) USB UHCI Controller #1
        Flags: bus master,medium devsel,IRQ 16
        I/O ports at fe00 [size=32]

00:1d.1 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI Controller #2 (rev 01) (prog-if 00 [UHCI])
        Subsystem: Intel Corporation 82801G (ICH7 Family) USB UHCI Controller #2
        Flags: bus master,IRQ 17
        I/O ports at fd00 [size=32]

00:1d.2 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI Controller #3 (rev 01) (prog-if 00 [UHCI])
        Subsystem: Intel Corporation 82801G (ICH7 Family) USB UHCI Controller #3
        Flags: bus master,IRQ 18
        I/O ports at fc00 [size=32]

00:1d.3 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI Controller #4 (rev 01) (prog-if 00 [UHCI])
        Subsystem: Intel Corporation 82801G (ICH7 Family) USB UHCI Controller #4
        Flags: bus master,IRQ 19
        I/O ports at fb00 [size=32]

00:1d.7 USB Controller: Intel Corporation 82801G (ICH7 Family) USB2 EHCI Controller (rev 01) (prog-if 20 [EHCI])
        Subsystem: Intel Corporation 82801G (ICH7 Family) USB2 EHCI Controller
        Flags: bus master,IRQ 16
        Memory at fdfff000 (32-bit,non-prefetchable) [size=1K]
        Capabilities: [50] Power Management version 2
        Capabilities: [58] Debug port

00:1e.0 PCI bridge: Intel Corporation 82801 PCI Bridge (rev e1) (prog-if 01 [Subtractive decode])
        Flags: bus master,latency 0
        Bus: primary=00,secondary=01,subordinate=01,sec-latency=32
        I/O behind bridge: 0000d000-0000dfff
        Memory behind bridge: fde00000-fdefffff
        Prefetchable memory behind bridge: 00000000fdd00000-00000000fdd00000
        Capabilities: [50] #0d [0000]

00:1f.0 ISA bridge: Intel Corporation 82801GB/GR (ICH7 Family) LPC Interface Bridge (rev 01)
        Subsystem: Intel Corporation 82801GB/GR (ICH7 Family) LPC Interface Bridge
        Flags: bus master,latency 0
        Capabilities: [e0] Vendor Specific Information

00:1f.2 IDE interface: Intel Corporation 82801GB/GR/GH (ICH7 Family) SATA IDE Controller (rev 01) (prog-if 80 [Master])
        Subsystem: Intel Corporation 82801GB/GR/GH (ICH7 Family) SATA IDE Controller
        Flags: bus master,66MHz,IRQ 17
        I/O ports at <unassigned>
        I/O ports at <unassigned>
        I/O ports at <unassigned>
        I/O ports at <unassigned>
        I/O ports at f800 [size=16]
        Capabilities: [70] Power Management version 2

00:1f.3 SMBus: Intel Corporation 82801G (ICH7 Family) SMBus Controller (rev 01)
        Subsystem: Intel Corporation 82801G (ICH7 Family) SMBus Controller
        Flags: medium devsel,IRQ 17
        I/O ports at 0500 [size=32]

01:04.0 Ethernet controller: Realtek Semiconductor Co.,Ltd. RTL-8139/8139C/8139C+ (rev 10)
        Subsystem: Realtek Semiconductor Co.,Ltd. RTL-8139/8139C/8139C+
        Flags: bus master,latency 32,IRQ 18
        I/O ports at de00 [size=256]
        Memory at fdeff000 (32-bit,non-prefetchable) [size=256]
        Capabilities: [50] Power Management version 2

01:06.0 Ethernet controller: Realtek Semiconductor Co.,IRQ 17
        I/O ports at dc00 [size=256]
        Memory at fdefe000 (32-bit,non-prefetchable) [size=256]
        Capabilities: [50] Power Management version 2

01:07.0 Ethernet controller: Realtek Semiconductor Co.,IRQ 19
        I/O ports at da00 [size=256]
        Memory at fdefd000 (32-bit,non-prefetchable) [size=256]
        Capabilities: [50] Power Management version 2

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