1. A method comprising: receiving, by one or more computer processors, an application transaction to be executed to a first portion of a computer storage device, wherein the first portion of the computer storage device is configured to store application data; generating, by one or more computer processors, at least one Redundant Array of Independent Disks (RAID) transaction associated with the application transaction to be executed to a second portion of the computer storage device, wherein the second portion of the computer storage device is configured to store parity data of the application data; storing, by one or more computer processors, the application transaction to be executed to the first portion of the computer storage device in a first buffer; responsive to determining that a storage capacity of a second buffer configured to store RAID transactions reaches a threshold, determining, by one or more computer processors, whether to prioritize execution of the application transaction to the first portion of the computer storage device or to prioritize execution of RAID transactions to the second portion of the computer storage device; responsive to determining to prioritize execution of the application transaction to the first portion of the computer storage device, performing, by one or more computer processors, a write-through operation for the application transaction to the first portion of the computer storage device; and responsive to determining to prioritize execution of RAID transactions to the second portion of the computer storage device, executing, by one or more computer processors, at least one RAID transaction stored in the second buffer to the second portion of the computer storage device.