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Winner
"Best Storage Solution"
LinuxWorld 2005 |
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CORAID
First Partner in China |
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- Coraid EtherDrive products use the AoE protocol
to connect disks to servers using Ethernet。
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- ATA-over-Ethernet (AoE) is
a thin protocol layer directly on top of Ethernet.
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- ATA disk commands (ie. read
disk sector x, write disk sector y) are put directly
into standard Ethernet frames using the AoE protocol.
AoE is a block storage protocol.
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- An AoE protocol driver in the host operating system
provides the initiator function for the host to
access storage connected to an Ethernet port.
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- The AoE driver bridges the operating systems block
device driver interface to the hosts Ethernet driver.
This allows the host to use a standard Ethernet
NIC.
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- AoE target devices (ie. EtherDrive disk storage
appliances) connect via standard Ethernet.
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- AoE can work with any OS. An AoE driver is inside
the main Linux kernel. Drivers are available for
Linux, FreeBSD, Solaris and Windows.
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- AoE target devices are just like local disks.
They can be used like a normal hard disk drive,
but since they are network connected, the disk can
be shared with any network connected host.
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- AoE target devices can be partitioned like a normal
disk, and supports any filesystem like a normal
disk.
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- AoE target devices can be a single disk or a group
of disks assembled into a RAID set.
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- As with any block storage device, the host operating
system can also create RAID sets from AoE devices
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- The AoE block devices can be managed with storage
virtualization tools like logical volume managers
and other volume management tools.
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- AoE devices naturally work with disk-to-disk backup
software and virtual tape library software systems
designed to work with hard disk drives。
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- AoE devices work with any filesystem or as directly
accessed disk as is required by database applications.
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- A single AoE device can be partitioned
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- Each partition can be accessed by a separate server
or application.
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- Each partition can have its own unique filesystem
(ie. EXT3, JFS, XFS, Reiser, etc.).
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- A single AoE device can be shared if a cluster
filesystem is used (ie. GFS, Lustre, etc.).
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- The AoE protocol can be used for unrestricted
access to the disk volume or can be used to apply
access rules。
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- Using port based VLAN access zoning can be established。
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- Coraid's SATA+RAID EtherDrive storage appliances
also support optional MAC address filtering to restrict
server access for each logical AoE device。
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- Coraid's AoE storage devices support a "configuration
string" which is written to the storage device.
Once enabled, the config string can be used to restrict
disk access to only hosts that use the config string
in their AoE storage requests.
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