Hi Eerin, Thanks for your response. The Linux server containing the Promise FastTrak 100 controller, also has an Adaptec 29160 SCSI 3 controller with 4 IBM 36 GB SCSI disks. The SCSI disks are configured into 4 ( 17GB ) Linux Software Mirrored ext3 file systems, /dev/md0 thru /dev/md3. Fortunately everything is working fine. I have a system with Linux Software RAID co-existing fine with the FastTrak 100 RAID card using the ataraid and pdcraid modules. Your comment that the ATARAID module is "NOT" fault tolerant is very unsettling. My primary reason for using RAID mirroring is to protect the data on the disks. If a disk fails, the server needs to continue servicing users, until the failed disk can be replaced. You are correct, the Linux Software RAID is very fault tolerant. The Linux Software RAID's fault tolerant capability works great. Are you certain that ATARAID is "NOT fault tolerant" ?? If Linux crashes when a an IDE disk in an ATARAID array fails, then we will know immediately when a disk fails in the FastTrak array. So much for needing array monitoring software. Being fault tolerant is very important. Are you sure that ATARAID is NOT fault tolerant ?? ( Arjan, Does the ataraid module support a fault tolerant RAID-1 array ?? ) If one disk fails, Will the file system on the remaining disk be OK ?? Rebooting is inconvenient, but loosing a file system defeats the primary reason for investing in RAID-1 mirroring. Thanks, Jim Eerin Mikael Rosenström wrote: > On Wed, 16 Jan 2002 jimwest@xxxxxxxxxxxxx wrote: > > > I have just installed a Promise FastTrak 100 RAID controller using > > RAID-1 (mirroring) with two 36GB Western Digital drives. > > > > I am using the "ataraid" and "pdcraid" modules with the 2.4.13-ac8 > > Kernel in a RedHat 7.2 installation with the FastTrak 100 card. > > > > Things are working fine. > > > You can simulate drive fault to unplug drive power cable... > > > Is there a way to monitor the health of the array in Linux ?? How do I > > know both > > drives are working ?? How do I know when a drive in my array goes down > > > You know, because ataraid is not fault tolerant, If drive fault, linux > die... > > > without rebooting ?? The FastTrak FastMenu program on the FastTrak PCI > > card provides much of this information, but it is necessary to reboot > > the machine to run the FastMenu program. Is there a way to learn the > > status of the array while running Linux ?? Has anyone written a Linux > > program that can read the FastTrak bios that > > is available for download ?? > > Beter way is use linux software raid. It is fault tolerant. But it is not > windows compatible. > If you want monitor drives condition there exist package ide-smart. > > I tried make two servers with ataraid and mirroring but that dosn't > worked. > I got them online using linux software raid and nowdays they work fine. > They have msi k7t turbo mb 2*60GB ibm hd:s. Look: > http://www.math.hut.fi/ > > -*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-* > > **** Eerin Rosenström **** > ** Servinmaijantie 12 F 77 ** > ** 02150 Espoo ** > ** p. +358 9 4682997 ** > **** p.+358 40 5205030 **** > > -*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*
