By Benjamin Pimentel

Dell Inc.'s (DELL) shares headed south Wednesday on results that raised doubts about the company's ability to consistently grow profits while chasing higher-margin businesses.

But Dell's report also suggests that the hard-disk drive shortage that has hurt the personal computer market may not be as severe as many feared. One analyst said that bodes well for Hewlett-Packard Co. (HPQ), which is scheduled to post its results after the closing bell Wednesday.

Dell shares were last trading down about 5.8% to $17.15. H-P shares were down about 1.1% to $29.02.

Late Tuesday, Dell reported results for the quarter ended Feb. 3 that slightly missed Wall Street's earnings estimate. The company also put out a revenue outlook that fell below expectations.

Dell's results pointed to problems that H-P also faces, including a struggling U.S. public sector market and soft consumer demand. But the hard-disk drive shortage did not have as big an effect as many had speculated.

"Dell beat PC revenue expectations, meaning they were able to purchase all the hard disk drives they needed," ISI Group analyst Brian Marshall said in an e-mail. "I think H-P's guidance assumed they wouldn't be able to purchase all the drives they would need for the quarter. I think they were able to purchase them."

However, Bernstein Research analyst Toni Sacconaghi said it was unclear "how much of its hard disk drive issues were company specific."

He wrote in a note to clients that PC makers Acer Inc. (2353.TW) and Lenovo Group Ltd. (LNVGY) passed on higher hard disk drive costs to customers, noting that both of those companies also gained share from "white box," or unbranded, PCs.

"Our field checks suggest that H-P responded very differently than Dell to hard disk drive supply issues by raising prices on transactional sales and discontinuing low-end products, which appears to have translated into notable share loss," he added.

Dell did say that the company didn't get enough supply of higher-end capacity drives limiting its ability to make and sell higher-end PCs. That is a problem for a company that has been trying to push deeper into higher-margin segments markets by de-emphasizing lower margin businesses.

Those efforts have paid off, as Dell's improved profit margins have won praise on Wall Street, where the stock had jumped roughly 24% since the first of the year before Tuesday's report.

Dell's report quickly sparked a debate on what it means for the company's push for greater profitability.

"That's all folks," Needham analyst Richard Kugele quipped in a note, as he downgraded the stock to hold from buy. "It's been an impressive run year-to-date for Dell, rising over 24% and surpassing our $17 target as the fundamental improvements in its business mix were gradually recognized by investors."

But Kugele said he sees the shares limited in the $16-$20 range near term "as headwinds from the hard-disk drive shortage, lingering weakness in federal/state & local/US consumer spending, and continued pruning of the revenue mix combine to limit top-line growth and bottom-line leverage over the forecast period."

Citigroup analyst Richard Gardner also cut his rating to neutral from buy, arguing in a note, "In general, the easy margin expansion related to PC supply chain re-engineering is behind the company, suggesting more volatility in operating margins and earnings going forward."

Bernstein's Sacconaghi also wrote that the company "provided a somewhat incomplete explanation for the shortfall on its earnings call, but we believe the majority was attributable to hard disk drives and that Dell was caught off guard by its hard disk drive mix in the quarter."

But he also noted that the company's "cash flow continues to be very strong, the stock's valuation is compelling, and the company continues to effect a positive mix shift in its business."

J.P. Morgan analyst Mark Moskowitz also offered an upbeat view, citing Dell's effort to expand its higher-margin businesses.

"We believe that there is 3-6 months of revenue pruning before the stage is set for growth," Moskowitz wrote. "Plus, current demand challenges in the public sector are not helping. We recommend that long-term investors take advantage of any pullback in the stock."

-By Benjamin Pimentel; 415-439-6400; AskNewswires@dowjones.com