NEC Express5800 320La System Configuration Manual

Also see for NEC Express5800 Series: User guide User guide User guide User guide Configuration guide

Contents

2-8 Configuring LinuxConfiguring Internal Disk DrivesThe hard disk drive storage bays can house up to six hard disk drives, whichwhen mirrored results into three logical drives. The physical disk drive slots arenumbered 1 to 6 (left to right), but the SCSI ID is numbered 0, 1, 2, 0, 1, 2.When mirrored into two pair of three logical disk drives, the first mirrored pairconsists of hard disks 1 and 4 (SCSI ID 0), the other two disk mirrored pairs arehard disks 2 and 5 (SCSI ID 1) and hard disks 3 and 6 (SCSI ID 2). A duplexaccess channel is implemented by giving each group of drives separate channelsfrom two PCI modules. Physical access channels for internal SCSI disks are setin dual configuration as shown in the below table. Dual channel access to alldrives is available from either PCI module. Refer to the table below. The serveralso provides a single channel for general SCSI disks.Channels for SCSI DisksPCI1 – Channel1 – SCSI Slot 1, 2, 3PCI1 – Channel2 – SCSI Slot 4, 5, 6PCI2 – Channel1 – SCSI Slot 4, 5, 6PCI2 – Channel2 – SCSI Slot 1, 2, 3The table below shows the correlation between the SCSI disk slot numbers anddevice names. Use the device names to access the internal SCSI disks andperform operations.Slot number Device name1 sda2 scb3 sdc4 sdd5 sde6 sdfIMPORTANT: When a disk is added or RAID is rebuilt, each disk enters the"RESYNCING" or "RECOVERY" state. While the disks are in this state, do notremove them, turn off the power, or restart the system. Wait until RESYNCING"or "RECOVERY" has completed. (You can confirm the current RAID status byexecuting ftdiskadm.) If you should accidentally reboot your system during the"RESYNCING" or "RECOVERY" state, the data on your disks has not beencorrupted. After reboot, the "RESYNCING" of your disks restarts from thebeginning. Your server is not in a fault tolerant state until "RESYNCING" hascompleted.