System and method for discovering a virtual disk spanned across independent storage controllers
View Patent ↗An information handling system includes a first storage controller coupled to a first storage device, a second storage controller coupled to a second storage device where the first storage device and the second storage device comprise a virtual disk and a processor to initiate a first discovery of the first storage device, initiate a first discovery of the virtual disk on the first storage controller, complete the discovery of the first storage device, initiate a first discovery of the second storage device, initiate a second discovery of the virtual disk on the second storage controller, determine that a first timeout for the first discovery of the virtual disk on the first storage controller will expire prior to completing the first discovery of the second storage device, and initiate a second discovery of the first storage device in response to determining that the timeout will expire.
1. An information handling system, comprising:
a first storage controller coupled to a first physical storage device;
a second storage controller coupled to a second physical storage device, wherein the first physical storage device and the second physical storage device form a single virtual disk; and
a processor configured to sequentially:
1) initiate a first discovery of the first physical storage device;
2) initiate a first discovery of the virtual disk on the first storage controller;
3) complete the first discovery of the first physical storage device;
4) initiate a first discovery of the second physical storage device;
5) initiate a second discovery of the virtual disk on the second storage controller;
6) determine that a first timeout for the first discovery of the virtual disk on the first storage controller will expire prior to completing the first discovery of the second physical storage device; and
7) initiate a second discovery of the first physical storage device in response to determining that the timeout will expire.
2. The information handling system of claim 1 , wherein the processor is further configured to:
complete the second discovery of the first physical storage device;
complete the first discovery of the second physical storage device;
initiate a second discovery of the virtual disk on the first storage controller; and
complete the second discovery of the virtual disk on the first storage controller.
3. The information handling system of claim 2 , wherein the processor is further configured to:
direct a command to access the virtual disk to the first storage controller in response to completing the second discovery of the virtual disk on the first storage controller.
4. The information handling system of claim 3 , wherein the processor is further configured to:
assign a Logical Unit Number (LUN) associated with the first physical storage device to the virtual disk in response to completing the second discovery of the virtual disk on the first storage controller.
5. The information handling system of claim 2 , wherein the processor is further configured to:
drop a command to access the second physical storage device in response to completing the second discovery of the virtual disk on the first storage controller.
6. The information handling system of claim 2 , further comprising a storage controller driver and a Redundant Array of Independent Drives (RAID) driver, wherein the processor is further configured to:
invoke the storage controller driver in initiating the first discovery of the first physical storage device and in initiating the first discovery of the first physical storage device; and
invoke the RAID driver in initiating the first discovery of the virtual disk and in initiating the second discovery of the virtual disk.
7. The information handling system of claim 6 , further comprising:
an operating system (OS) interface, wherein, in response to determining that the first timeout will expire, the processor is further configured to provide a notification to the OS interface to initiate the second discovery of the first physical storage device.
8. The information handling system of claim 7 , wherein the processor is further configured to:
invoke the RAID driver in providing the notification.
9. A method, comprising:
initiating, by a processor of an information handling system, a first discovery of a first physical storage device coupled to a first storage controller of the information handling system;
then initiating, by the processor, a first discovery of a virtual disk of the information handling system on the first storage controller, wherein the virtual disk is formed by the first physical storage device and a second physical storage device coupled to a second physical storage controller of the information handling system;
then completing the first discovery of the first physical storage device;
then initiating a first discovery of the second physical storage device;
then initiating a second discovery of the virtual disk on the second storage controller;
then determining that a first timeout for the first discovery of the virtual disk on the first storage controller will expire prior to completing the first discovery of the second physical storage device; and
then initiating a second discovery of the first physical storage device in response to determining that the timeout will expire.
10. The method of claim 9 , further comprising:
completing the second discovery of the first physical storage device;
completing the first discovery of the second physical storage device;
initiating a second discovery of the virtual disk on the first storage controller; and
completing the second discovery of the virtual disk on the first storage controller.
11. The method of claim 10 , further comprising:
directing a command to access the virtual disk to the first storage controller in response to completing the second discovery of the virtual disk on the first storage controller.
12. The method of claim 11 , further comprising:
assigning a Logical Unit Number (LUN) associated with the first physical storage device to the virtual disk in response to completing the second discovery of the virtual disk on the first storage controller.
13. The method of claim 10 , further comprising:
dropping a command to access the second physical storage device in response to completing the second discovery of the virtual disk on the first storage controller.
14. The method of claim 10 , further comprising:
invoking a storage controller driver of the information handling system in initiating the first discovery of the first physical storage device and in initiating the first discovery of the first physical storage device; and
invoking a Redundant Array of Independent Drives (RAID) driver of the information handling system in initiating the first discovery of the virtual disk and in initiating the second discovery of the virtual disk.
15. The method of claim 14 , further comprising:
providing a notification to an operating system interface of the information handling system to initiate the second discovery of the first physical storage device in response to determining that the first timeout will expire.
16. The method of claim 15 , further comprising:
invoking the RAID driver in providing the notification.
17. A non-transitory computer-readable medium including code for performing a method, the method comprising:
initiating a first discovery of a first physical storage device coupled to a first storage controller;
then initiating a first discovery of a virtual disk on the first storage controller, wherein the virtual disk is formed by the first physical storage device and a second physical storage device coupled to a second storage controller;
then completing the first discovery of the first physical storage device;
then initiating a first discovery of the second physical storage device;
then initiating a second discovery of the virtual disk on the second storage controller;
then determining that a first timeout for the first discovery of the virtual disk on the first storage controller will expire prior to completing the first discovery of the second physical storage device; and
then initiating a second discovery of the first physical storage device in response to determining that the timeout will expire.
18. The computer-readable medium of claim 17 , the method further comprising:
completing the second discovery of the first physical storage device;
completing the first discovery of the second physical storage device;
initiating a second discovery of the virtual disk on the first storage controller; and
completing the second discovery of the virtual disk on the first storage controller.
19. The computer-readable medium of claim 18 , the method further comprising:
directing a command to access the virtual disk to the first storage controller in response to completing the second discovery of the virtual disk on the first storage controller.
20. The computer-readable medium of claim 19 , the method further comprising:
assigning a Logical Unit Number (LUN) associated with the first physical storage device to the virtual disk in response to completing the second discovery of the virtual disk on the first storage controller.