Method for accessing shingled magnetic recording SMR disk, and server

1. A method for accessing a hard disk, the method comprising:

receiving, by a server, a data write request comprising target data and address information of the target data, wherein the hard disk includes multiple storage zones;

identifying, by the server, according to the address information, a target storage zone from the multiple storage zones;

retrieving, by the server, write pointer information of the target storage zone directly from a cache of the server, such that the server does not need to send an open zone instruction to the hard disk to obtain the write pointer information, wherein the write pointer information is address information of latest stored data in the target storage zone;

instructing, by the server, the hard disk to store the target data based on the write pointer information;

receiving, by the server, a completion write request with updated write pointer information;

storing, by the server, the updated write pointer information into the cache; and

retrieving, by the server, the updated write pointer information from the cache without sending an open zone instruction and a report zone instruction to the hard disk for a next read or write operation.

2. The method according to claim 1 , further comprising:

determining, by the server, whether an address of the target data exceeds a write pointer of the target storage zone.

3. The method according to claim 1 , further comprising:

determining, by the server, that a quantity of cached records in the cache of the server has reached an upper limit value;

marking, by the server, a cached record in the cache of the server as an invalid cache record; and

removing, by the server, the invalid cache record from the cache of the server.

4. A server, comprising

a communications bus;

a cache coupled to the communications bus; and

a processor coupled to the communications bus and configured to:

receive a data write request comprising target data to be stored into a hard disk and address information of the target data, wherein the hard disk includes multiple storage zones;

identify, according to the address information, a target storage zone from the multiple storage zones;

retrieve write pointer information of the target storage zone directly from the cache, such that an open zone instruction does not need to be sent to the hard disk to obtain the write pointer information, wherein the write pointer information is address information of latest stored data in the target storage zone;

determine whether an address of the target data is greater than and contiguous with a write pointer of the target storage zone;

in response to the address of the target data being not greater than or not contiguous with write pointer of the target storage zone, return an error;

in response to the address of the target data being greater than and contiguous with the write pointer of the target storage zone, instruct the hard disk to store the target data based on the write pointer information; and

receive a completion write request with updated write pointer information.

5. The server according to claim 4 , wherein the processor is further configured to store the updated write pointer information into the cache.

6. A non-transitory computer-readable medium having processor-executable instructions stored thereon for accessing a hard disk, wherein the processor-executable instructions, when executed, facilitate:

receiving, by a server, a data write request comprising target data and address information of the target data, wherein the hard disk includes multiple storage zones;

identifying, by the server, according to the address information, a target storage zone from the multiple storage zones;

retrieving, by the server, write pointer information of the target storage zone directly from a cache of the server, such that the server does not need to send an open zone instruction to the hard disk to obtain the write pointer information, wherein the write pointer information is address information of latest stored data in the target storage zone;

determining, by the server, whether an address of the target data is greater than and contiguous with a write pointer of the target storage zone;

determining, by the server based on whether the address of the target data is greater than and contiguous with the write pointer of the target storage zone, between whether to return an error and whether to instruct the hard disk to store the target data based on the write pointer information, wherein in case the address of the target data is not greater than or is not contiguous with the write pointer of the target storage zone, the server determines to return an error, and wherein in case the address of the target data is greater than and contiguous with the write pointer of the target storage zone, the server determines to instruct the hard disk to store the target data based on the write pointer information; and

based on the determination of whether to return an error or whether to instruct the hard disk to store the target data based on the write pointer information, returning, by the server, an error or instructing, by the server, the hard disk to store the target data based on the write pointer information.

7. The non-transitory computer-readable medium according to claim 6 , wherein the processor-executable instructions, when executed, further facilitate:

after completion of storing the target data, receiving, by the server, a completion write request with updated write pointer information.

8. The non-transitory computer-readable medium according to claim 7 , wherein the processor-executable instructions, when executed, further facilitate:

storing, by the server, the updated write pointer information into the cache.