Managing phys of a data storage target device
Embodiments of the present disclosure generally relate to managing phys of a data storage target device. In one embodiment, a method of managing phys of a data storage target device includes waiting to receive a host address on a target phy and transmitting a target phy address for the target phy after waiting to receive the host address on the target phy. In another embodiment, a method of managing phys of a data storage target device includes configuring a target port comprising a first target phy and reconfiguring the target port comprising a first target phy and a second target phy.
1. A method of managing phys of a data storage target device, comprising:
waiting an amount of time to receive a host address on a target phy, wherein the amount of time is less than a time out window; and
transmitting a last target phy address of a last link for the target phy when the host address for the target phy is not received during the amount of time waited to receive the host address on the target phy,
wherein transmitting the last target phy address establishes the target phy in a wide port if the last link was a prior wide port,
wherein transmitting the last target phy address establishes the target phy in a narrow port if the last link was a prior narrow port.
2. A data storage device, comprising:
a controller;
a first phy and a second phy;
a non-transitory computer readable storage medium containing instructions when executed by the controller cause the controller to:
wait an amount of time to receive a host address on the first phy, wherein the amount of time is less than a time out window; and
transmit a last phy address of a last link for the first phy when the host address on the first phy is not received during the amount of time waited to receive the host address on the first phy, wherein the last phy address establishes a target phy in a wide port if the last link was a prior wide port, and wherein the last phy address establishes the target phy in a narrow port if the last link was a prior narrow port.
3. A data storage device, comprising:
a controller;
a plurality of phys;
a non-volatile memory; and
a means for determining a phy address to transmit during a SAS identification window to configure the phys into any port configuration, the means for determining configured to:
update a lookup target identification table of a first link,
store the updated lookup target identification table in the non-volatile memory,
retrieve the updated lookup target identification table from the non-volatile memory across a power reset or power loss of the data storage device; and
establish the phys into a port configuration matching the first link during a second link.
4. A data storage device, comprising:
a controller;
one or more ports;
a plurality of phys;
a non-volatile memory; and
a means for configuring the plurality of phys into a configuration selected from the group consisting of one of the following:
(1) four narrow ports,
(2) two narrow ports and one wide port,
(3) one narrow and one wide port,
(4) two wide ports, and
(5) one wide port,
wherein the means for configuring is configured to:
update a lookup table of a first link,
store the updated lookup table in the non-volatile memory,
retrieve the updated lookup table from the non-volatile memory across a power reset or a power loss of the data storage device; and
establish the phys into the configuration matching the first link during a second link.