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Old 12-01-2004, 12:21 PM   #1
OkiTek
LQ Newbie
 
Registered: Nov 2004
Location: Okinawa Japan
Distribution: Fedora Core 3
Posts: 5

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SATA RAID 1 "Mirror"Gnome reads combined size


I have 2 SATA 74GB Raptor Hard Drives (no others), configured in Raid 1 (Mirror) with an Asus A8v Deluxe Motherboard, on the Promise PDC20378 Raid Controller.

Why does Gnome show the Filesystem as being 148GB under the Computer icon "there is only one filesystem drive listed"

When the computer POSTs, the Raid Controller displays 1x2 Mirror 74GB Functional

When the Kernel boots it reads,

--------------------------------------------------------
-dmesg-
-snip-
sata_via version 0.20
ACPI: PCI interrupt 0000:00:0f.0[B] -> GSI 20 (level, low) -> IRQ 201
sata_via(0000:00:0f.0): routed to hard irq line 10
ata1: SATA max UDMA/133 cmd 0xC000 ctl 0xB802 bmdma 0xA800 irq 201
ata2: SATA max UDMA/133 cmd 0xB400 ctl 0xB002 bmdma 0xA808 irq 201
ata1: no device found (phy stat 00000000)
scsi0 : sata_via
ata2: no device found (phy stat 00000000)
scsi1 : sata_via
sata_promise version 1.00
ACPI: PCI interrupt 0000:00:08.0[A] -> GSI 18 (level, low) -> IRQ 177
ata3: SATA max UDMA/133 cmd 0xFFFFFF0000004200 ctl 0xFFFFFF0000004238 bmdma 0x0 irq 177
ata4: SATA max UDMA/133 cmd 0xFFFFFF0000004280 ctl 0xFFFFFF00000042B8 bmdma 0x0 irq 177
^
_____________________| These drives support 150, is this speed supported?

ata3: dev 0 cfg 49:2f00 82:74eb 83:7f63 84:4003 85:74e9 86:3c43 87:4003 88:407f
ata3: dev 0 ATA, max UDMA/133, 145226112 sectors: lba48
ata3: dev 0 configured for UDMA/133
scsi2 : sata_promise
ata4: dev 0 cfg 49:2f00 82:74eb 83:7f63 84:4003 85:74e9 86:3c43 87:4003 88:407f
ata4: dev 0 ATA, max UDMA/133, 145226112 sectors: lba48
ata4: dev 0 configured for UDMA/133
scsi3 : sata_promise
Vendor: ATA Model: WDC WD740GD-00FL Rev: 27.0
Type: Direct-Access ANSI SCSI revision: 05
SCSI device sda: 145226112 512-byte hdwr sectors (74356 MB)
SCSI device sda: drive cache: write back
sda: sda1 sda2
Attached scsi disk sda at scsi2, channel 0, id 0, lun 0
Vendor: ATA Model: WDC WD740GD-00FL Rev: 27.0
Type: Direct-Access ANSI SCSI revision: 05
SCSI device sdb: 145226112 512-byte hdwr sectors (74356 MB)
SCSI device sdb: drive cache: write back
sdb: sdb1
--------------------------------------------------------
Should I be loading a scsi driver before installing or using the Via controller?
--------------------------------------------------------
$ df [Reads]
Filesystem 1K-blocks Used Available Use% Mounted on
/dev/mapper/VolGroup00-LogVol00
140657552 7924592 125587900 6% /
/dev/sda1 101086 9986 85881 11% /boot
none 512248 0 512248 0% /dev/shm
/dev/hdc 2577410 2577410 0 100% /media/cdrecorder
--------------------------------------------------------
Is "/dev/mapper/VolGroup00-LogVol00" the two drives combined?
Does /dev/mapper/ mimic scsi here?
--------------------------------------------------------
uname -a
Linux 2.6.9-1.667 x86_64 GNU/Linux
--------------------------------------------------------
/sbin/lspci
-snip-
00:08.0 RAID bus controller: Promise Technology, Inc. PDC20378 (FastTrak 378/SATA 378) (rev 02)
-snip-
00:0f.0 RAID bus controller: VIA Technologies, Inc. VIA VT6420 SATA RAID Controller (rev 80)
--------------------------------------------------------
Thanks for your explanation and insight.
Jason
 
  


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