So we’re you using the computer when the error occurred? If yes, it was probably the other drive or it was a minor read error. Are you using Windows? If yes, you could do a check disk in command prompt (chkdsk) on both drives with the parameters to repair the repair and recover.
It depends on how long you’ve had the card and what their warranty period is. The typical warranty period is 1 year limited warranty. Contact support and check warranty status with your card manufacturer. You may be outside of the warranty period and up the proverbial creek.