Sony PCG-SRX99 - Manual (Page 57)

Notes on using i.LINK optical disc drives
 You can use the supplied Application Recovery and System Recovery CDs with an i.LINK optical disc drive. See
Application and System Recovery CDs for more information.
 Do not use an optional i.LINK optical disc drive and an optional optical disc drive with PC Card at the same time.
Connecting both drives may cause a system malfunction.
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