X-bit Labs has an update about the impact of the Thai floods on the HDD market, you can read it over here.
Due to the flooding, Western Digital shut down two local plants, which will result in a 60% capacity decrease and Seagate suffers from tight supply of components. For exmaple, Nidec, which controls nearly 80% of the global HDD motor market, has temporarily shut down seven factories; it is not yet known when operations will resume. In general, everything points to the fact that in several weeks the PC industry may be hit by shortage of hard drives. But not everything is that bad.
According to TrendForce, currently PC OEMs have an average of approximately two to four weeks of HDD inventory remaining. Along with HDD suppliers’ key component inventory, the industry supply chain has over two months of stock left. At the end of this period, the PC industry will enter its down season in the beginning of December, and the decreased demand will counteract any risk of material shortages. It should be kept in mind that the demand for PCs in China increases early in the year and it remains to be seen whether HDD manufacturers are able to fulfill the demand then.