IBM N Series Hardware Manual page 222

Halting the N series
You can use the command line or FilerView interface to stop the N series. You can use the
halt command on the CLI to perform a graceful shutdown. The -t option causes the system
to stop after the number of minutes that you specify (for example, halt -t 5). The halt
command stops all services and shuts down the system gracefully to the Common Firmware
Environment (CFE) prompt.
File system changes are written to disk, and the nonvolatile random access memory
(NVRAM) content is vacated.
Use the serial console because the IP connection will be lost after halting the N series
(Example 16-8).
Example 16-8 Halting with the command-line interface (serial console)
CFE version 1.2.0 based on Broadcom CFE: 1.0.35
Copyright (C) 2000,2001,2002,2003 Broadcom Corporation.
Portions Copyright (C) 2002,2003 Network Appliance Corporation.
CPU type 0x1040102: 650MHz
Total memory: 0x40000000 bytes (1024MB)
CFE>
Booting the N series
As described in 16.2.1, "Starting the IBM System Storage N series storage system" on
page 199, the IBM System Storage N series storage systems automatically boots Data
ONTAP from a PC Compact Flash card. This card ships with the most current Data ONTAP
release. The Compact Flash card contains sufficient space for an upgrade kernel. Use the
download command to copy a boot kernel to the Compact Flash card.
The CFE prompt provides several boot options:
boot_ontap
boot_primary
boot_backup
netboot
Tip: Store a boot image on an http or TFTP server to protect against Compact Flash card
corruption.
For more information about setting up netboot, see the following website:
http://www.ibm.com/storage/support/nas/
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IBM System Storage N series Hardware Guide
Boots the current version of Data ONTAP from the Compact Flash
card.
Boots the current version of Data ONTAP from the Compact Flash
card as the primary kernel (the same kernel as boot_ontap).
Boots the backup version of Data ONTAP from the Compact Flash
card. The backup release is created during the first software upgrade
to preserve the kernel that shipped with the system. It provides a
known good release from which you can boot the system if it fails to
automatically boot the primary image.
Boots from a Data ONTAP version stored on a remote HTTP or TFTP
server. The netboot option enables you to boot an alternative kernel if
the Compact Flash card becomes damaged. You can upgrade the
boot kernel for several devices from a single server.
To enable netboot, you must configure networking for the IBM System
Storage N series storage system using DHCP or static IP address.
Place the boot image on a configured server.