I need to install a raid HBA internal card on a T5240. The reason is I have
more drives and the current mother board controller does not support more
than 4 drives.
My question is I have raidctl set up on current drives. If I install new HBA
card do I have to delete current raidctl and... (3 Replies)
Hi,
I need to redirect internal internet requests to a auth client site siting on the gateway. Currently users that are authenticated to access the internet have there mac address listed in the FORWARD chain. All other users need to be redirected to a internal site for authentication.
Can... (1 Reply)
Hi all
i would like to ask some suggests about my next job!
I have to install a new Sun Netra T5220, with an additional internal StorageTek SAS HBA Raid.
The problem come in if every disk is now controlled by the HBA, how can I install the OS?
No disk is being detected by the OS.
SAS card... (2 Replies)
I have a V490 that has couple internal disks attached to the same dual-port HBA card that I'm planning attach to the SAN for additional storage.
Would I sacrifice performance if I use the same HBA?
Is it better to throw in a new HBA instead? (1 Reply)
I need some assistance formatting a compact flash card in Ubtunu.
I connect up the CF card through a USB reader. Ubuntu recognizes the reader usb device, but does not "mount" the CF card as a device.
The CF card was formatted in FAT32 format.
Any help would be greatly appreciated.... (3 Replies)
Around a month ago we suffered a prolonged power outage, due to circumstances the servers and storage arrays were still in use when the UPS dropped. One of the servers was running a flash copy on the database while batch processing had commenced. This is the only server that suffered any further... (2 Replies)
Hi All,
I have a rather stange set of requirements that I'm hoping someone here could help me with. We receive a file that is actually a concatenation of 4 files (don't believe this would change, but ideally the solution would handle n files).
The super-file looks like:... (7 Replies)
I have noticed that when I copy files to flash disk and in UI I see message copy completed in notification area on task bar, usually copy is not completed. So, if I eject the media I loose data.
It is very serious problem because may cause loss of valuable and even critical data.
Moreover, when... (2 Replies)
Hi
I have been trying to figure a way to copy a file, (a template), that has internal variables. Using the values as defined for those variables in another script.
So a file called x -
#! /bin/bash
D=aa.$X.bb
And file y
#! /bin/bash
X=6
while read line
do
eval echo... (5 Replies)
Hey guys, wondering if this is possible to accomplish.
PowerHA SystemMirror7.1 active/passive cluster. Restored a clustered system in test and upgraded to the latest version of PowerHA. Things are working great. However in the interest of time during cut over to the new system, I was hoping to... (4 Replies)
Discussion started by: j_aix
4 Replies
LEARN ABOUT FREEBSD
nand
NAND(4) BSD Kernel Interfaces Manual NAND(4)NAME
nand -- NAND Flash framework
SYNOPSIS
device nand
DESCRIPTION
The FreeBSD nand framework consists of a set of interfaces that aim to provide an extensible, object oriented environement for NAND con-
trollers and NAND Flash memory chips from various hardware vendors, and to allow for uniform and flexible management of the NAND devices. It
comprises of the following major components:
o NAND Flash controller (NFC) interface.
Defines methods which allow to send commands as well as send/receive data between the controller and a NAND chip. Back-end drivers for
specific NAND controllers plug into this interface and implement low-level routines for a given NAND controller.
This layer implements basic functionality of a NAND Flash controller. It allows to send command and address to chip, drive CS (chip
select line), as well as read/write to the selected NAND chip. This layer is independent of NAND chip devices actually connected to the
controller.
o NAND chip interface.
Provides basic operations like read page, program page, erase block. Currently three generic classes of drivers are available, which pro-
vide support for the following chips:
o large page
o small page
o ONFI-compliant
This layer implements basic operations to be performed on a NAND chip, like read, program, erase, get status etc. Since these operations
use specific commands (depending on the vendor), each chip has potentially its own implementation of the commands set.
The framework is extensible so it is also possible to create a custom command set for a non standard chip support.
o NANDbus.
This layer is responsible for enumerating NAND chips in the system and establishing the hierarchy between chips and their supervising
controllers.
Its main purpose is detecting type of NAND chips connected to a given chip select (CS line). It also allows manages locking access to the
NAND controller. NANDbus passes requests from an active chip to the chip controller.
o NAND character / GEOM device.
For each NAND chip found in a system a character and GEOM devices are created which allows to read / write directly to a device, as well
as perform other specific operations (like via ioctl).
There are two GEOM devices created for each NAND chip:
o raw device
o normal device
Raw device allows to bypass ECC checking when reading/writing to it, while normal device always uses ECC algorithm to validate the read
data.
NAND character devices will be created for each NAND chip detected while probing the NAND controller.
SEE ALSO libnandfs(3), gnand(4), nandsim(4), nandfs(5), makefs(8), mount_nandfs(8), nandfs(8), nandsim(8), nandtool(8), newfs_nandfs(8),
umount_nandfs(8)STANDARDS
Open NAND Flash Interface Working Group (ONFI).
HISTORY
The nand framework support first appeared in FreeBSD 10.0.
AUTHORS
The nand framework was designed and developed by Grzegorz Bernacki. This manual page was written by Rafal Jaworowski.
BSD March 8, 2012 BSD